they're really cheap


personally I don't prefer them. If you can afford one, a well made purpose-built snake enclosure is just as easy to clean, heat, and maintain humidity.

one thing I hate about the tubs is that they are top-opening. A good snake enclosure is front-opening. It allows you to come at your snake at his level, rather that from above when picking him up or doing maintenance. I know my snake and frogs exhibit stress signs when things come at them from above, so I believe that the front-opening enclosure is better.