i got some at Target because i have long arms and wasn't feeling anything when doing a pushup but now i can! even dropping to bent knee they are great. it is harder to do straight leg. p90x freak!
I use those, too. I got them b/c I have problems with my wrists, but I agree with you that you can feel it a lot more with the bars. I had some that were shaped differently and they were okay, but the ones I got at Target work much better. (And I am not talking about bras. )