I love them but it's difficult to find one over 10 gallons. This one has a slate bottom and is heavy. The only thing I don't like about it is that I'm skeptical about drilling the bottom for an overflow. Even if I drilled the perfect hole, I'm still thinking it would leak around a bulkhead.
Exactly the way I look at it. What's old is new. These tanks are becoming rare and will probably never be produced again on a commercial level. Even if they made a comeback, they would cost a fortune due to materials and workmanship. I want my room filled with these even if I have to painstakingly add steel trim to all-glass tanks to do it.