I just picked up a PMR about 2 months ago. I was running an ion and I aws tired of all the crap it gave me so I finally got fed up enough to buy a new gun.
The PMR beats my ion hands down.
Pros
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Lightweight, the grip frame is a composite plastic which makes it crazy light. The after market UL frame is slightly heavier, yet is still incredibly light.
Fast, thing shoots ropes
Hardly kicks at all, makes aiming a second nature thing
Easy to program, board is pretty simple
Easy to clean, I can clean my entire bolt in 30 seconds
Stock eyes are fantastic, I haven't had a chop yet
Stock board is fantastic, same as the board in DM7's
Cons
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Will require 2 upgrades after a while: feedneck, Back cap. Both are plastic and inevitably will wear out after a while. I suggest just replacing them out of the box.
(Some nice ups to get if you have money: Trigger, some people don't like it, some do. ASA, it's not on/off)
Board access is tedious, it doesn't take long and it isn't hard, but its like taking out the trash. It gets annoying after a while.
Reg can unscrew during play, you just need to make sure you tighten it before a game
All in all its a great little marker. I personally chose it over the mini. If your thinking about getting one, get the PMR SE. It comes with some of the upgrades that a regular PMR needs (like backcap and feedneck) for only $20 more than a regualr PMR.
Regular PMR: 9/10
PMR Special edition: 10/10
(These rating are in accordance of price to performance.)