I got a smoking deal on an Xcel Infiniti 5/4 Drylock last year and surfed in water down to 40 degrees last year. Also had 5 mil boots and 3 mil Drylock gloves. Very toasty, very flexible. It was my first chest-entry suit, so it took a little getting used to, especially because of my stocky build...but I got used to it, and it stretched out a little bit after a few sessions. I think it's an excellent suit, and it also has even better reviews than Rip Curl and O'Neill to name a few.