I used the Mother's a few weeks ago and it worked great. FYI, the faster or more powerful the drill the better your results will be. I initially tried it with a 12v Craftsman cordless and discovered it wasn't working very well. I went to a more powerful industrial corded one and then got the results I was looking for. An 18v cordless may be powerful enough,though. idk.
I'll be trying the 303 next week in hopes it will last longer than the Back to Black I've been using for the past few years.