Maybe I expect too much, but the bag makes only a slight difference. It does end the dust coming out the vac chute, but the dust blowing out the front,back,and underneath still requires cleanup after a couple cuts, which is what I was trying to eliminate. I love Bosch, especially the 4100. This is the only negative I've experienced.
Upon arrival not too impressed by the quality of the dust collector, but figured why not give it a chance? I install kitchens and often I have to cut inside the house of my clients. I installed the bag and went about installing the kitchen. i forgot all about the dust collector until time for clean up, I went to get a broom and couldn't believe that the bag had contained almost all the sawdust. This thing really works well.