I haven't had a chance to wear this rashguard for very long yet as it arrived in summer after I'd already done most of my cottaging trips, but I know it's not going to disappoint me. It keeps you a bit warmer in colder water, the fit is snug and gently compressing in a way that I really like, and unzipping it just a bit gives you a great cleavage moment.
I'm a 40" bust, 34" waist, bit of a tum, 39" hip and I got the L. It's tightest at the chest, some might find it too compressing, but I like the way it keeps my boobs in place even when I'm not enjoying the slight anti-gravity effect of water. My only issue is that there is a little wrinkle in the fabric just above the right bottom hem over my butt, and it doesn't quite seem to go away no matter how I smooth it. I think I may be able to fix it if I iron the seam a bit, but I don't know that I would even bother because it's hardly noticeable.
A great purchase, and totally worth the price, especially given that some lesser-quality and less sustainably-made suits are just as much if not more.