I bought this off eBay, needed a replacement for my old rig.
Like the swap out design feature, can set it up as a 4+1 (how I purchased it) or take out the bottle pouch and add another pod holder. Has a nice big well ventilated back pad. Once you get it the velco belt assy adjust for your self it fits quite well and does not limit you in any way.
If your looking for a new rig give it a look see, cost $35.00. I'd buy it again.