I have used one since age 8, so never really an issue.
HH style quiver.
Pro: Easy for me to draw an arrow from the quiver by the nock and place it on my string with out taking my focus off the target and maintain one smooth steady motion.
Pro: If it is properly broke in and forms to your back it holds the arrows in place and quite, even bending over to pick up an arrow the others will not come out.
Pro: Can be adjusted from your back to under your arm if navagating through thick brush, like a lot of othere style's.
Pro: Carry a variety of arrows at once. Broadheads, blunts, judo's, name it. Use a piece of leather lace to divide if needed.
Con: for most maintaining broadhead integrity in the quiver is a problem for most. What I do and works for me is ATTACH a foam block in the bottom for my broadheads, usally 3 or 4.
Con: It takes practice (for me) to maintain my ability's of using it, just like anything else.
There are other little things like other style quivers. I got a Jack Bowers stalker that I like but need practice with drawing an arrow out of it quietly.
Again practice with anything will improve ones abilitys.
Earl