I'm not trying to argue with anyone or say they are wrong, but lets think about this: We are talking about snakes being "happy" in their viv's. Now, if I were a snake, I wouldn't be happy in ANY viv, whether it be big or small or nicely decorated or plain with a single hide, paper towels, and a water dish. We must remember that snakes are still wild creatures, and no amount of space or lack of space is going to change that. However, if their basic needs are met, then they are as happy as any other snake in captivity. Just a note, but I've had snakes in sterilites and a snake in a larger glass viv, and they were/are all very active: They were all trying to escape. Snakes just do that. They don't want to be cramped in any size viv any more than we would want to be cramped in a house all the time.