As a beta tester of this product, I have to give it generally a favorable review. My local power company is actually sending me checks monthly in such an amount that it covers my rent. However, the downside is that my cat really loves to sleep on top of it since it is nice and warm, recently he has grown an extra tail. I'm not sure if the reactor is the cause or not, but I'm going to give this a 4.5 out of 5 star review, just to be on the safe side.