I have a 29g/20L double tank setup. The 20L is on the bottom. I don't love it, but it works because of lack of floor space. I have a Python for water changes and it isn't hard to do water changes in the 20L. The hard part is worrying about sucking up shrimp and fish...haha. I don't like the lack of storage and the fact that my canister filter for the 29g has to be out in the open...same with the timer/power strip. I don't have a problem with double stands...though I'd rather have a wooden cabinet stand for each tank. I voted yes, I like them.