I have been running one for about 8 months. I like it. Although it has lots of limitations, for an all in one, I don't think much compares. But everybody's comments on here are true. You can't run it without a chiller unless you keep your house at like 68 in the summer. And even then wit the closed lid, the 6 T5's are just waaaay too hot.
The fact that it doesn't have a sump is kind of a downer because doing things like chillers, calcium reactors, and the like are very cumbersome. It is the first tank I've ever had so it is perfect for learning about the hobby. But I think if I stay with the hobby and move to a bigger residence, I will most definitely get something with a sump. But it is a beautiful tank.
I have a few threads where I have shown things that I have done like a calcium reactor, but it's tough. And Hoang is right, the skimmer is a major PITA.
Regards,
Sia