It is not only correspondence. I ordered my tank shortly after that. We got some delays. Joe called me saying my tank is ready but their quality control caught a defect and he asks me if I can wait little bit longer. I was not in a hurry so why not, it happens. He offered me an significant upgrade to low iron glass (3 sides, my tank in peninsula style). Second tank arrived but it had a crack/chip/defect in the corner and even I told Joe I don't care about appearance because it is in a place I won't see, he said it doesn't look good and he will make me another aquarium and this time he will deliver it in person. Glasscages is 6 hours of driving to my place. Have you experienced such a devotion to build a brand? Warranty doesn't include such case since I accepted shipping. But hey, they made things right.
Smaller tanks up to let's say 75g you can buy at Petco, no issues. I have freshwater tank from them. And such tanks in custom manufacturer like Glasscages are just expensive, you cannot beat $100 for 75g at Petco. But for bigger tanks or custom dimension you just have to go custom. So, affordable big tank which I believe will be a major player on the market in US is Glasscages. Ratio on price to product quality and customer service is the highest I have ever seen.
My tank is ready and running (you can check my journey in my build thread, link is under my avatar). I am not affiliated with Glasscages in any matter, I am just happy customer who will share the word of Glasscages to anyone who things about new big tank.