That's the difference between a Quadrajet and a Holley. If you go with the Holley, like B said, you better know somebody that knows how to work on it. If you go with a Qjet, once you put it on(unless you change your motor fundamentally), you don't ever have to touch it again.
That's B.S. and not Bjorn's point at all. The point is, the best one to get, is the one you're comfortable setting up to begin with. Holley's do not require adjustments anymore than any other brand. I've set mine up 7 years ago, and haven't had to touch it. Even with a healthy cam, I can still start it up dead cold and within 10 seconds put it in gear and drive away.
A majority of the "complaint problems" are people that just don't understand tuning in general, can't figure out how to tune all the different circuits of that type of carb. That's why you'll find followers of each type.
Don't expect to pull a carb out of a box and it's tuned for your combination either. Setups are not a one size fits all. That's why people who buy from Cliff are pretty satisfied with his particular Qjets as he has enough experience to get it pretty close to in-tune before shipping it to you. Which is nice, but what are you going to do when you change a camshaft, change heads, gears, or move from Daytona Florida to deep in the Colorado mountains? Ship it back and forth to Cliff?
So forget all the "that brand sucks, this one's walks on water" b.s. and go with the one that you think you or a friend aren't going to be a afraid to adjust (whether it's a Carter, Qjet, or Holley). And then go out and buy a couple books and look research online about how to tune it. Whichever brand you choose, as long as you or a friend are willing and able to understand it and tuning in general, you'll be happy.