Megabloks is hit and miss for me; while I mostly dislike their stuff, there are some products which I find very pleasing in a way or another, eg: this fabulous motherfucker:
I'll always pick up this type of dragon if I saw it in a toystore, I have like 3 now. I'm also having high hopes about their Warcraft-licenced sets. Hopefully it won't be tits.
My experiences with other, lesser-known clone brik brands were abysmal though; hollow, cheap plastic with weird pale-ish colours. Some even had an odd stench. I avoid them like plague.