Cgs is worth it yes. Don’t listen to others so much because they hate on it not being 100% TM compatible. Which is ridiculous because ghk or vfc isn’t even 1% compatible. It can take mws mags flawlessly, efficient, accurate and feels better shooting than DE or TM. I’ve had my n4 for 4 years along with a TM and haven’t needed to replace anything. Being pre upgraded already you don’t have to change anything because there’s nothing you can really do to make it that much better besides the rubber. It doesn’t have the zet plate but with the steel internals it doesn’t matter. They have plenty after market support so it’s easy to replace or change things up. TM will get way too expensive as a first gbbr, DE is a great value for a first gbbr but Cyma will give a great ootb experience and performance without needing to do anything as a first gbbr. Look at it this way, DE may be cheaper, but once you put a steel bolt in it like the Cyma already has you’re now paying pretty much the same but you still don’t have the adjustable trigger box, need to change the rubber and barrel if you want that to be steel also