I bought the Astral V-Eight PFD specifically with my Rebel Ilaga in mind, which has a low seat-back and low flat aft deck. I wanted a vest that would not restrict arm movement or present any obstacles for rolling. I am also using this during Florida's hot summer months so I was looking for a mesh back for coolness. This vest scores 5 stars on all of these points. In addition, the shoulder straps, chest strap, and dual side straps, on each side, can be individually adjusted, keeping the vest snug and comfortable. I have had no feeling of the vest riding up on me nor have I experienced any arm restrictions during advanced paddle techniques. I like the zipper access on the pockets making a cross arm retrieval of my phone a quick and easy process. The pockets are not deep if you like to carry a lot of gear, but I don't carry a lot of gear on my vest. I feel safe and secure in the V-Eight which is what a PFD comes down to. I am 5'9", 172 lbs with a 41" chest and like to take long walks on the beach (LOL... couldn't resist). I selected the Medium/Large. This is a perfect fit with plenty of room on the straps.
Astral also makes a woman's version, which is less bulky in the chest.