Pros: Warm and light, fits well through shoulders, great for swimming, no buoyancy.
Cons: Too short in torso.
I wanted a shirt to wear swimming when the lake is a bit cold. This provides a decent amount of warmth, more than an ordinary lycra rashguard. I wanted a rashguard like this over one with neoprene because I didn't want any buoyancy -- wanted to feel the same in the water as not wearing one, which it is.
Great freedom in the shoulders for swimming. The neck is actually pretty high, but not so high to be uncomfortable. Sometimes I forget I'm wearing it.
A medium fits me skin-tight, and I can just barely get it on and off, but this is just what I wanted for swimming. My chest is 40", waist 35", height 5'11"; it wouldn't fit anyone bigger than me.
The one downside to this shirt is its length (and why I'm only giving it 4 stars and not 5). It is short in the torso. It could use another 2-3 inches of length. It barely covers my bellybutton. I would definitely not recommend it for anyone taller than me.