I find it hard to believe one supplement can cover for everything, every day, but then again I have nothing to back this up with. We're just going off a companies claims and the fact it hasn't caused any provable damage to an animal. I have it and think it has some use, but I personally wouldn't exchange it for the more conventional methods. I know people that have and they don't seem to have problems though. Just my opinion.
There's no research people/companies will talk and talk, but they have nothing to back any of this up with.
Edit: I don't mean to say this is dangerous, more trying to get across the point that most/all of us are just guessing at reptile nutrition. So to say it's much better than other methods seems strange, better at what? No offense intended, I've just always been a little confused about this supplement and its claims.