I don't use them simply because I feel I have a better "grip" without them.
Not to mention they really don't help that much imo.
I'm no Olympic power lifter but for power cleans, hang cleans, deads (the style of lifting I do)...they just tear after awhile, so I don't waste any more money on them.
I have calluses, but palmer cocoa butter pretty much evens that out if you are concerned about having rough "grips" when you are applying baby oil to a nice firm female ass.