Ha ha......these threads get me.
Here is the number one reason a lot of people do not like backquivers:
They take effort, training, practice, and need to be well designed and broken in. Like all things traditional once you accomplish all that the benefits are many and the drawbacks become inconsequential.
First read this and get set up properly:
http://traditionalknowhow.blogspot.com/ There was a reason Howard Hill, Ben Pearson, Bob Swineheart, and MANY others decided to stick with the back quiver despite the availability of the bow quiver and others.
Carrying many arrows has its advantages. I carry at least a dozen and half are blunts. Many times I have used all 6 on squirrel and wanted more!
Speed is an advantage. That follow up shot magically appears on your string without looking. Sometimes things happen and a fast second shot is useful.
Stealth - If set up right and on the back of someone proficient one can crawl and sneak through thick brush easier than with a bow quiver catching stuff.
Flagging game---never been an issue for me as I usually have an arrow on the string and the follow up is so fast and smooth there is no problem. My fletchings ride low behind me and usually cannot even be seen from the front as I ease through brush.....and yes, I do live in the thickest of the EAST!
You also have a built in game carrier if you happen to kill a few squirrels out there...