Bests & Worsts Reviews from Amazon

I haven't taken mine to the lake yet but I want to write a review to help with the sizing issue. With lots of RUNS SMALL and lots of JUST RIGHT reviews, which is it? I say JUST RIGHT if you do water sports and actually get in the water and don't like your life jacket up around your ears and pressuring your arm pits. RUNS SMALL if you want to wear it comfortably on a boat or canoe and just want safety in case you fall in. I am 5'4", 135 lbs and somewhat lightly endowed. I bought a medium and it is very snug but fits properly in my opinion because I wear my for active sports and can't have it riding up. The fabric and design are excellent and it seems very durable. I am very happy with my purchase.