I received my 2XU LIGHT SPEED REACT SLEEVED TRISUIT today. I was really looking forward to trying it on. In terms of size, I was a medium but close to a small, so I hesitated. However, I have large quads and a fairly muscular upper body with very little fat. So I decided to go with the medium. I wanted a snug fit, but not too tight. I am 5'9" and weigh 161 lbs.
The medium fit was perfect. It was still tight around the thighs and biceps, but not uncomfortable. The middle of the body was between tight and loose. The fabric quality and design were exactly what I was looking for. It's very comfortable. I can't wait to wear it at Ironman Texas on April 18. I'm sure it will help me perform at my best and get me to Kona in October.