Review on Optimal Sizing for Cycling Shoes by John Young

I've used them in five or six sessions. They are very comfortable and fit well. I'm US women's size 7 or 7.5. Size 38 fits me well. I had the problem that my spikes were loose the first time. At first they seemed good, but during my first session with them they got weaker and weaker. My right foot started slipping around the pedal and I was having a very hard time releasing it. I tightened the screws as much as I could and they've been fine ever since. Unfortunately, no hex wrench is included, but luckily my tool kit had a working hex screwdriver. I think this is a common problem with these shoes (which I didn't notice in the reviews before buying them myself) so make sure you tighten the studs as much as you can before using them for the first time use. FYI: There is a review somewhere here that says they didn't get their shoes on time even though they had the Prime. I think it's because it's coming from the flywheel itself. I have USPS shipping information so I can see my shoes arrive from Ohio, go to Revain, and then to me.