I didn't get mine from nashbar, but those sure look like the same thing.

I just got mine, after reading this thread. I love them. My toe clips and straps were falling apart. I asked at REI once about the powergrips, but the store guy told me he did not think they were so good, and tried to get me to go clipless. go figure. I did not go clipless, because I don't want to pay for it right now. So today I put the powergrips on and rode only a few miles, but they were great. They held my feet tight, and they were easy to get out of. No more clips and straps for me. I had some problems getting my feet in after stoplights, but I had problems when I first used toe clips too. I know I will get better in a few days. I still plan on going clipless one day, but I'm going to hold off until a birthday or something, and then I will still have the powergrips on this bike.