I've actually had better luck with tubs then I have with tanks. I have a borneo that is about 11 months old. I've had her 9 of those months. She's always been a good eater and is actually my favorite snake, but I had humidity problems in her glass enclosure which caused some weird eye "dimpling". I spoke with Kara of BloodPythons.com and she recommended putting her in a plastic tub.
I didn't really have a issue with this cause most of my other animals were already in tubs so I made the switch and sure enough the dimpling subsided and actually I've noticed that she spends more time outside of her hide now because the heat is more evenly distributed in her tub so she doesn't have to stay in just to be comfortable.
But I agree with JLC, if you're up to the task of maintaining a vivarium and your animal thrives in it, then go for it.
By the way I keep all my ball pythons in tubs and they do very well, some don't even have hides cause they don't use them.