what, like every "first gun" thread? haha, anyone who clicked a few threads here will know that's the general advise, but people dont^^ (I'm not being bitter or anything, if we didn't want to answer we wouldn't!)
Go on http://www.justbbguns.co.uk/, click any of the rubbish guns and look at the reviews. the question is who writes the reviews?
Someone new to airsoft or someone with a lot of experience and knowledge? someone who just got their first aeg or someone who tried and owned a large variety? someone wanting to share the joy of an excellent gun or someone trying to convince themselves they've made the right decision or just bragging about how great their gun is? someone who have phurchased the first AEG they found or someone who been crawling forums a long time before taking the decision? someone who have just gotten the gun or someone who have skirmished it for a long time? you get the idea
Honestly, I've never held a CYMA m4. But from all what I hear from people whose opinions in airsoft I trust, they are far inferior to the G&G CM16... and this is from someone who loves CYMA (well, some of their AKs - witch I btw would recommend over the G&G CM16, if you have the extra money)