I just purchased two of their 14 gallon rimless cubes. They were $35 each on sale. I have only had them set up for a few days now, so cant speak to how they are going to hold up yet. The 30 gallon tank is listed online locally here for $65 on sale, but no one has any.
They are not a low-iron glass tank.
My 2 did not leak, yet. As for the build quality... the edges are polished and beveled well. The silicone is not messy or over done, but... They did not take their time squaring everything up very well after applying the silicone. Where the glass edges meet up are not done very well. It isn't horrid, but they could have done this so much better.
The silicone seems to be holding up so far, we will see how it lasts.
I'll try to grab a pic or 2 tomorrow after work.
Picture is three different corners showing poor fitting/alignment. Still no leaks so far. For the $35 each I paid for the 14 gallon cubes I can not complain. Would I pay $100 plus for tanks in this line, nope.