Of course it's worthy buying!!
There are those here who will like it, and who will hate it.
It's not modular, so it's not the latest in High Speed kit. It will have more room than you can ever use, short of carrying everything you own.
Well built, sound construction.
Backpack can fold away so you can use a real backpack, or you can take a seam-ripper and remove it permanently.
Though it comes with two canteen holders, the backpack will accommodate a 70oz hydration reservoir when laid on its side.
Currently, I only have the "old style" in stock. This one doesn't have the adjustable shoulders like you see in the picture...which is really only important if you are a very large guy or a large guy wearing heavy body armor. Otherwise it should be big enough for most folks. I am 5'10, 210-215lbs, 44" chest and can wear it fine.