I have just started using a V-weight, it feels great, only thing is that the center of ballance changes and once you tilt to one side, the Vweight has a tendancy to turn you on your back, thats the only difference i have found. the weight is behind you and not at your sides and not pulling your head up and torso down, much better trim in my eyes since most of the dive you have to be horizontal. i find i am much more stable horizontally when working and taking pics u/w and that is important when it comes to working over corals.
i like them