When I was thinking about running multiple enclosures off one thermostat, etc, Brian Barnett put things in perspective for me by pointing out that the thermostat is the snake's lifeline. If it fails and lets the temp go too hot, you have a dead animal. I know that some keepers have very carefully built large systems without thermostats, but these are well monitored and I do not have such a well controlled climate in my house. I would rather spend a bit of extra money on the thermostat and be sure it works. If the product is good, go for the bargain, but make sure it is reliable.