I have mine in a 30g tank. Not a 30 long. My temperatures are steady and ever since I did the foil treatment on the lid, my humidity has been steady as well. I don't have any problems with my tank and my snake has always done well.

I thought about switching to a tub, but I'd miss the clearness of the tank. My snake hides all the time, but I still like being able to see him in his hides. His tank is definitely on display, but it's in the back corner of my bedroom and 99% of the time, I'm the only person in there.

The one and only thing that makes me want to switch to a bin is the cleaning issue. I am 5'3", 110lbs and I absolutely cannot lift the tank up to clean it by myself. Every time I have to clean his tank, I think "great... how am I going to do this by myself"? It has really become an issue for me.