I use one for practice, 3D's and if I'm just chasing squirrels or small game. They can carry more arrows than a regular quiver. I carry some flu-flu's, judo's, blunts and hex heads in mine all the time.
I don't use it for large game because of broadheads rubbing together and dulling themselves, although that problem is easily corrected with "broadhead booties" that can be rigged to slip off.
Used a pattern from Tandy Leather to make my go-to back quiver and modified it to suit me. I added some D-rings to tie stuff on with, and punched a row of holes in the top to run laces through to cinch up arrows so they don't rattle. Done right, you can un-cinch it from the front without taking the qiver off to get to your extra arrows. I need to make another one now that I have used this one for a while and know the problems with it. I think I can still make some improvements.
As mentioned above, I pull the bottom under my arm pit and hold it there with my bow hand in thick stuff to prevent snags, etc.....
I like using it, but use a GFA for large game because it's easier to keep broadheads separated, and it's easier, for me at least, to hang and work with in a tree stand.
With that said, my first trad deer was taken using a back quiver I made and from a tree stand.