I have the CM-16 in black and have gamed i a few times. Currently have about 15k bb's through it between plinking and gaming.
Now I am also fairly new to airsoft but have no complaints about the gun other than you may notice a bit of mag well slop and possible feed issues with some generic plastic mags. I cured this with a 1/2 long piece of sticky backed fuzzy velcro on the inside of the the rear mag well.
Also I'd get a spare battery. Below is a video from earlier this month.
*WARNING* Some parts may contain colourful language.
If found to be offensive mods please delete or let me know and I will remove link.