I have the Bosch and can confirm the collet lock can get dust jammed. The switch never was a problem and I liked the design. The collet lock can be opened by UNPLUGGING and wiggling the bit with your fingers a little bit. I like the way the side cutter attaches.
They eat bits easily on drywall and plaster if you press too hard. Friction heats up real fast and burns them right through. Far more powerful and far higher RPMs than a Dremel.
For what I needed the better price over the Craftsman was worth it.
THIS MAYBE THE SECOND OR THIRD MOST DANGEROUS TOOL I HAVE. The other two being the radial arm saw, and the router in a router table. #4 the table saw.
If you aren't careful the bit can get pulled out if not fully tightened and if you aren't fully in control and it rides out of the cut, you better have both hands on it because you don't want it finding your hand or any other part of your body.
I'm not familiar with the Craftsman, but IF I was designing either I'ld build in a deadman on the handle.
They really generate a lot of dust, dust masks, ear and eye protection are a must.
Don't try to cut too fast and they are great tools, try to cut too fast and watch the hell out.
If you are cutting wood only stay with dremels and saber saws.