One of the magazines rated this scope as a good buy. Personally, I don't know much about these scopes, but if it costs $400, then I wouldn't take a chance either.
Heck, for $400 I'd buy something that has a proven track record - Elite 4200, Nikon Monarch, even the Zeiss Conquest.
And don't put too much emphasis on the 30mm tube thing either. I used to and discovered it's more hype than anything else. The biggest advantage (actually probably the only advantage) to the 30mm tube is that it is able to have a higher amount of adjustments, but that's about it.
Again, if you want to spend $400 for it, then go for it, but if it were me, then I'd buy something else.
Zachary