Customer Reviews
Very Pleased overall 
2005-07-28
I've owned a Dewalt & Makita Orbital sanders and I like the Bosch the best - stock removal rate seemed much faster than the Dewalt and Makita. I was a little concerned about the dust it was kicking up at first, but when the filter caked after 10 minutes of use the problem was gone. My one beef is the vac adapter. If you want to connect a shop vac you must purchase a seperate adapter - I don't like that idea. I would like companies include these items with the purchase. At the very least make it clear at the time of sale an adapter is needed for a shop vac. I would have given this item five stars if the adapter was included etc.
Years of dependable service 
2004-11-13
I have owned the 3725 since it was introduced in the mid to late 90's and have been very happy with it's performance and dependability. I am an architectural finish carpenter (collumns, arches, wainscaoting, etc...) and this sander gets heavy use at least 3 days each week. I have replaced the hook and loop pad 4 times and worn out the anti swirl ring years ago (I either start the sander once placed on the material or place the sander on the material where it will be trimed "snipe area"). With the right paper this sander can be used for heavy stock removal as well as final sanding. I constantly use the variable speed option and find myself working the sander one handed. For heavy stock removal or fine balance it's nice to be able to use both hands.
Make no mistake regarding random orbit sanders and think they will perform every job. I use a palm (orbital) sander for easing edges, getting in corners, and sanding round overs.
There are other options out there at about half the price, but experience has shown me they will not perform half of the jobs the 3725 will (stock removal - final sanding).
Toooooooooo Muuuuuuuuccccchhhhh Vibration 
2004-10-04
The sander has a lot of power, but vibration is a problem with this tool. Maybe the handle design transfers the motor vibration. I have have many Bosch tool which I am very happy with but I cannot recomend this one.
Bad Boy of orbitals 2004-03-16
I've had this sander a couple of months now. It's excellent for larger jobs, as you can get both hands on the tool, crank up the power and really get some a$$ behind it when needed, yet still sand more delicate items by slowing the speed down. It's size is both good and bad. On the downside, if you are sanding items which require you to hold the item with one hand and the sander with the other it is somewhat difficult with this sander as it is primarily a two handed tool. Also this sander is larger than palm sanders and cannot get in some smaller areas. I've used it sometimes for several hours at a time and have found it to be comfortable to use. It is adequately powered. The dust collection is better than the other sanders i have, and the big bag fills quickly. My only complaint is that right in the center of the sanding pad is about a 1 inch hole with a small bolt to hold the pad onto the sander. This hole, being so large, makes it impossible to round corners with this sander. Bosch could have improved this easily. (the reason for four instead of five stars) This is a great investment if you do a lot of sanding and need a step above a palm sander, but keep your palm sander handy for rounding corners!
Great Value 2003-12-01
Great value for the $$$--Can't go wrong with a great company like Bosch!
Excellent General Purpose Random Orbit Sander 2008-07-14
I've owned this sander for over two years now and have used it on a number of projects. I'm a big fan of Bosch and own several various tools from the company. Bosch's quality is outstanding in my opinion. This sander is no exception. I chose the 5" over the larger 6" because the slightly smaller size is more appropriate for general purpose work on furniture (again, my opinion). This slightly smaller sander is a little lighter and easier to manage. The 6" is nice if you're working on large projects, but is unnecessarily large for most of my woodworking needs.
As other's have said, no RO sander will do everything, a smaller detail sander is still necessary for corners, etc. But for general use, this sander is exceptional. The variable speed is a must have for controlling the rate of removal and comes in very handy when working on sensitive areas. It is ergonomically comfortable to use with well designed handles. The canister dust collection is outstanding, although it must be cleaned often while using or it will start backing up and its effectiveness becomes considerably diminished. There is an available adapter for connection to a vacuum, which of course enables superior dust collection, but for all but large projects or constant use, the canister works just fine.
Bottom Line: I have several sanders and this is the one I always reach for first. I highly recommend it.
bogus 
2007-12-05
This is actually a review I wrote for the Bosch planer. But as I already had written a previous review It would not allow a 2nd one. So I am writing it here.
I think some of these reviews are fake. After cmy problems with this planer I noticed that some of the other reviews were so glowing. so I clicked on " Ted Peterson".
Surprise, surprise. He has made 8 reviews. All 8 were Bosch products!! All 8 were rated 5 star!! And all 8 were gushy in their praising of Bosch perfection. All 8 repeatedly mentioned the Bosh name and could not find ONE bad thing to mention in the performance of 11 tools. Have you ever bought 11 perfect tools?
Same for " Skip Morris". 9 reviews. 9 Bosch tools ( and nothing else). Nine 5 star reviews. Nine Bosch love affairs.
I think they work for Bosch.
Never Again!!! 2006-05-20
This sander touts itself to be ready for the toughest job, but after replacing the pad and having the main center bolt break after slightly over a year of use in a sign shop this sander comes up very short. I was dissapointed in this being a Bosch product and have recently purchased the Rigid 5" sander which is superior in every way, less vibration, smoother & quicker results, a carrying case, extra pad, sanding discs and other extras.
Bosch Sander 2006-03-22
I was pleased to make this purchase at a very good price. I use one at work every day and wanted one for my home use.
Not bad but serious reliability problems. 
2005-11-07
I am a fan of the better Bosch tools. I love the jig saw. But after buying three of their sanders (a belt sander, and two ROS including this one) I will not buy another. All three were plagued by reliabilty problems and the belt sander had tracking problems. (I have used sanders from Fein, Makita, and DeWalt and have never had a problem with any of them.)The 3725 had a series of problems: repeated sudden inexplicable power losses not fixed by Bosch service, sudden loss of parts etc. It does sand quite well when working. It is smooth, gives good results, and easy to use. The dust removal with supplied bag is mediocre. I have not tried with vacuum.
