I have a bowmate. It is rigid and will not mold, which gives your arrows good protection, in case of a fall, etc. IMO, they are well made, come with a cover over the top, and are quiet. I don't believe they will hold as many arrows as a full sized Arrowmaster, but carry 6-7 with no problem, at least that's all I've ever carried in mine, by choice. Has an accessable zippered pocket located at the lower end of the quiver. I really like mine.
I'd have to say one that will mold vs. one that is rigid could be a tradeoff of sorts. I recall RC once saying his grandson stepped on his, don't recall if it was an Arrowmaster or Dawgware, and bent a few aluminum shafts.
Never owned an Arrowmaster, but they appear to be well made, and lot's of folks tote them.