I would go with herpstat. I have two of them and just love them. The company is also very good and they have absolutely excellent customer service. A member in the cornsnake forums had a problem with her herpstat. Apparently the fuse had blown. Anyways, the owner of herpstat contacted her on her post and told her to send hers in and he would replace it for free. Not only that he was going to give her the newer version with replaceable fuses. Pretty nice IMO