Why is it better than the pmr? Simplicity.
Count the orings
Thats about as disassembled as it gets.
I pretty much love it.
Light (very) Small (very) Quick (very).
Cocker threads are a plus (one of the main reasons I bought it...)
Definitely needed a new feed neck, and the rubber nub detents are a problem. The trigger wasn't a big deal to me, its adjustable and taking the spring out seems to help. Other than that as far as upgrades go you don't really need anything else.
I had a few strange problems out of the box, an off and on leak down the barrel that seems to have fixed itself, and a ton of chops. I just ordered kila magnetic detents, and im pretty sure they are gonna do the trick.
Ive gotten to play with it a few times, and it works great when its not chopping. I was shooting people through holes in branches from a distance so I would say it is pretty accurate.
For $300 (If you count "necessary" upgrades) its a GREAT choice.