I'm about to pick up a new APV and give my Triton kit to a friend. But this new one is bigger, and can't really carry it around concealed in pocket when I need to. Usually I use Blu disposables, but they don't do anything for me. I'm looking at ordering the g6 starter tomorrow. Anyone use these and have an opinion? Is it messy to refill? And does it leak? Any advice greatly appreciated!