I have used this product a total of 4 times since receiving it. Every time I used it, the spikes would loosen and my stance became unstable while riding. I'm very scared and have to stop training. Beside me three other people tried to tighten the spikes with an Allen key - they don't stay in place if you drive 5 minutes. No big deal, I wanted to buy some new spikes to go with the shoes. That was until I finished my fourth ride and the buckle got stuck. I had to take my foot out of the tight boot. The strap won't let go no matter how hard I try. I wanted to send them back but the return policy has expired. Looks like $100 is in the trash. In short --- BUYER BEWARE. These boots do not appear to be compatible with Peloton. Don't buy them if you use them for that.