i just got some about a week ago. i was always interested in them, but never wanted to spend the money to get them, then a buddy of mine gave em to me for my birthday. i really like em. i have an issue with my left wrist, i fractured my left arm and it healed wrong, so i have a lot of wrist pain when it comes to certain things. i prefer them over regular pushups just because its more comfortable, and because its more comfortable, i end up doing more pushups than i would normaly do. i cant say whether you would get better results, but im seeing results cuz im actually doing them more often and doing more of them now.
oh ya by the way i think i saw them at wal-mart for 20 bucks. i dont think they are worth more than that tho