I wore Nike shorts for several years and loved them. I wear a medium in all shorts so the sizing seems to be pretty true. I will say that my newest Nike's will be my last unless they change the chamois. The new chamois bunched up on me and felt AWFUL. I couldn't even ride 20 miles in them. However, everyone is different and I don't know if would even be the same chamois. You just kind of have to try shorts for yourself and see how they work for you. Yes, it can be costly, but it's usually worth it when you find what works for you.