Fits very well and is very comfortable.  I'm 5'11", 190 lbs.  The shirt is loose enough but cut close to the body so that it doesn't look like I'm wearing a wetsuit. There isn't so much fabric that it doesn't "sail" around in the pool either.  Dries quick.  Definitely provides UV protection and I don't put any sunscreen on my chest/abdomen when wearing this shirt and I haven't suffered any sunburn yet.  The material is a little thicker than the rashguard I bought from Target and this looks more durable at a lower price!  The stitching is nice and hasn't unraveled after near daily use last summer.  I've worn it a few times as an exercise shirt and worked OK, but definitely not a true performance wicking workout shirt.