Pretty much all the pros for tubs/racks listed here. Only major con I have with my bigger tub is I can't seem to find any shelving unit I can put it in. I'm thinking maybe those metal adjustable units might work but I don't want to waste the money to find out :/. Maybe something like this would work for what I have? http://www.homedepot.com/p/HDX-4-She...6BPS/205559612 Still. $50. Maybe after Christmas lmao.

Another con is visibility, like others have said. My UVB light makes it so you can see in pretty well during the day, but at night you have to pop the lid to see anything.