Thanks, cab is 60x22.5x22.5", plenty of height but pretty small. This is my first grow with more than a single plant. That said, other than a lack of variety, I can harvest way more than I can smoke. Vents are in the raised floor that goes through a light trap and out the side with some active carbon filters over them. The filters keep smell from coming out if there is not fan going (not generally the case) and keep light and critters from getting in.
I like the smart pots, they are cheap and work well. I think I probably need to water more with them than a traditional pot, but well worth it. I don't know that I would use anything else.