It really depends on what the gun is to be honest. There are good guns that are clear receiver'd, but there are also masses of guns that really, really don't compare. And the ones that do generally don't last too long without some impending failure internally or externally.
I invest in reputable brands for the reason they are reputable in the first place, reliability out of the box and performance to satisfy. While most clones have picked up their act as of late, there still is a chance of getting a peice of shit out of the box, i've taken those chances and quite frankly i've gotten the ass end of the deal on multiple occasions.
Call it a bad aftertaste if you will. I just won't put any more money in cheap airsoft guns anymore.