I don't have a review, but I'll write one since I have one.
The PTR is a fun gun to shoot. Every time I bring It out, my shooting partner wants to get some trigger time on it.
I don't know what the quality of the current production guns are, but my first one had to be replaced by the manufacturer. It would not eject spent casings. This was the case with almost all of the first run of guns from JLD.
The gun that replaced has never had a malf. However it only likes Mil surplus ammo. If I run federal American Eagle thru it, I get burst and blown primers. Also I had the same problem getting the gun zeroed that I did with the first one, but to a lesser extent. I ended up having to relieve the bottom of the sight drum to the the POI to an acceptable level. And even with the rear sight base drifted all the way to the left, my rifle still shoots a couple of minutes to the right.
I believe the sight issue is largely due to the cocking tube not being true with the bore. Although I am not an expert in the construction if HK style guns.
The buttstock and forearm are cheezy as hell, but I have not yet replaced them with HK furniture.
Recoil is vicious. Both my shooting buddy and I have bruised shoulders after firing just 20 - 30 rounds from the gun.
BOTTOM LINE: I like the gun, but wish I had only paid about $400.00 for it. It runs flawlessly. And even though it doesn't like commercial ammo, it has not misfed when I tried it. It is a very handsome gun. The finish is beautiful.