Fit as expected. I ordered an 8.5, which is the size of my nano 4s. I normally wear an 8 in regular shoes and a 9 in running shoes (only worm brooks or asics for running) so size wasn't a concern.<br />Now to preformance: the shoe feels fairly light on the feet and are easy to walk in. I would not advise running in these because they are not running shoes (duh) and will severely screw up form. I've used them for push presses, ohs, front squats and clean and jerks. With each lift I noticed how much more stable I feel on my feet and in my cleans each catch has been close to ideal wear these (no landing or falling forward, always sitting back on my heels). I have also done a few wods in these shoes, mostly wall balls and power cleans. Have not tried to do any burpees or box jumps, I'll leave those to be done in my Nanos or sprints!<br />This is a good lifting shoe and I would highly recommend it!