I have Nike grips too and I must say they are awesome. However, you have to hold grips like you don't have any wrist, so the only joints you have are your elbows.
Got that right, Kaylo. However, if you want someday to do push ups with only one arm, slow push ups are better, because if you do slow push ups you do for your strength and if you do fast push ups you do for speed. When I was doing fast push ups I couldn't even dream about push ups on one hand ...