I already have an NGRS MP5 (SD) and i like it. The recoil on it's not like a GBB but it's still pretty good. I just like having some feedback, unlike a regular AEG. If it wasn't decent i wouldn't've bought another. As you said, the AR is decent, my MP5 is pretty similar.
Shame the SCARs are lacking. I wanted an NGRS SCAR-L.