Eh. I think it's a matter of luck, even within a brand or model, and even by airsoft standards. Some people swear by CYMA tri-shots, but I got an absolute lemon with random hops and feeding issues. There's a lot of fragile little plastic pieces inside, always trembling just on the brink of breaking, regardless of whether it's in a plastic or metal shell. My ASG Franchi is much more consistent and smootherer, but completely unhopped.
Great fun when you do get a hit though, and, aside, it's significantly easier to push forward with your trigger-hand rather than hauling back on the pump action.