I've used both the vertical shoulder and the bandolier. Each has its advantages and disadvantages. For me, it all boils down to whether or not I'm also carrying a rifle. If I'm not, then I like the chest bandolier better. If I am carrying a rifle, then the chest bandoler tends to get bumped by the rifle when I'm holding the rifle in the "ready" position (i.e. right hand on grip, left hand on forearm, receiver close to my body). For that duty, the vertical bandolier seems to provide a better carry position.