I don't have a bit of trouble holding any position or changing positions even in minute increments. I understand her theory of the air moving in the BC bladder but you shouldn't have more than a couple of 'puffs' of air in it to start with if you are properly weighted. I won't go back to a jacket BC for anything other than pool where the chlorine is so hard on gear.
If it makes you feel better, go with the SeaQuest Quickdraw. It's an excellent jacket BC, I started out in one and still use it for pool sessions. Just make sure it fits you properly in all areas.
If it makes you feel better, go with the SeaQuest Quickdraw. It's an excellent jacket BC, I started out in one and still use it for pool sessions. Just make sure it fits you properly in all areas.