I had been looking at buying a GenTeal button up shirt for a while and finally pulled the trigger. I am very pleased I did! Their button up sport shirt is the best sport shirt I own! It's super comfortable and seems to be much better quality than my other button up shirts I own that bought at similar price points. A big plus for me is that you don't need to iron the shirt after washing and hanging dry, but they are not stiff like a typical non-iron shirts. I will most definitely be ordering more shirts! I highly recommend them if you are on the fence like I was.
Sizing is accurate. I'm 6'1" 175lbs and the Medium fits great!