I just purchased a 190 gallon tank from them a few months ago. You pretty much get what you pay for & I do not mean that in a bad way.
The tanks are very economical. The down side is that the customer service is not great (but is sufficient), the silicon work is sloppy, the trim is sloppy, the warranty is short and has lots of fine print, I had to look at an empty tank for 3 weeks waiting for the silicon to cure(4 weeks total for tall tanks), and recieving my tank was a pain b/c I meet thier truck in Denton at a truckstop and had to load it with my own help.
All that being said - I would probably buy another tank from them b/c I expected all of that bad stuff when I placed the order. Plus they built my tank exactly how I drew it up for them and it is built like a tank!
Hope that helps you.