Great Vest, Check The Sizing Chart
I've only been wearing the vest for the last couple of weeks, but I can tell you that it makes a huge difference on cold days. As other reviewers have mentioned, the controller that comes with the vest is a little big, and there isn't a really good way to mount it on your bike. The controller has a belt/pocket clip, and I have just been clipping it to my pants pocket. Be sure to check all the dimensions on the sizing chart. I am a big guy who likes the gym, and I had to go up 2 sizes to fit my chest, but the chart was accurate. The vest has a quality feel, and the seams are all well stitched. The wiring leads that come with the vest are well-made and long enough to allow for pretty much any bike/rider combination.