I'm a rafting guide on the New River in WV, and I've had this thing for a little over a month now. Long story short, it's fantastic. The S/M fits perfectly on my 6' 150 lb frame, and the high shoulder straps keep it out of my way whether I'm guiding a raft or running a ducky trip. It stays on great, doesn't ride up, and pops you right back up to the surface after even the gnarliest of swims. Speaking of swimming, it sits just right when you're swimming, be it aggressive (on your stomach) or defensive (on your back) swimming. It floats you just right in the water so that you can swim effectively without getting in your face. It adjusts down perfectly, and I really like the side zip, as you can wear it with the zipper undone when you're getting the trip prepped and still have the front and back to block the wind. The front zip pocket has way more space than it seems it does, and the mesh pocket is great for a water bottle, sunglasses (during calm spots) or a packet of trail mix! In summary, go for it, this PFD is fantastic.