I have two G&G's (GR16R4 SF and GR16), but none of them are CQB-R.
However, I sort of know their pros and cons.
Fast ROF, light weight (extremely suitable for whole-day milsim, seriously), nice external (hard-to-scratch flat-black paint, nice and clean trades), best manufactured handguard and stock ever except Systema/G&P, crane stock dimension very similar to G&P's i.e. real-steel dimension, small gauge wiring for larger battery space, real-dimension mag, etc.
Stock FPS <= 350, insufficient distance (hopup?) and accuracy (only GR16) even with stock G&G 6.04mm tightbore, lack of real trades, etc.
So, it's up to you now to decide.
Velocity, Distance, Acceleration, Time...
A gun has them all...