I got this to replace my previous enail that broke (power surge after 5+ years). This one has one switch to power on and off. When off, you can't see the temperature, which I don't like. Also, this unit started off slow. It would get to temperature in a reasonable time, but when it was used would drop over 60f (Not in Celsius not my fault). However after having it and using it for a few weeks, that issue has gone away. I regularly leave this on for hours at a time or all day. Let's see how long it lasts.