I personally don't know of a hunter who has been more successful killing more animals in more places and in more varied situations than Denny Sturgis Jr. He uses a Safari Tuff Arrowmaster most of the time, but I think he said for water buffalo he did use a bow quiver for a faster reload.
I prefer lighter mass weight bows, and bow quivers make them feel off balance to me. More to snag when going through thick stuff, offers little protection to the arrows and fletchings vs. an Arrowmaster, can make a lot more noise at the shot if an arrow gets loose, amplifies any bow movement, and I can think of at least one or two times I was contacted for an emergency string because someone cut theirs placing an arrow back in a bow quiver.
For me and the hunting I do, can't beat a well designed side quiver. Hides the arrows, protects the arrows, they won't get snagged and fall out, won't get loose and cause noise, won't flag, won't change the feel of the bow, can carry more arrows...
But that's just my opinion.