We have 3 - K&H Kitty Sills, 1 - Standard and 2 - Heated. Both of our cats love these things. During the winter they definelty prefer the heated over the standard. We usually will unplug them during the warmer months. The only complaint I have is the foam pad needs replaced on the one kitty sill that's only 2 years old. It gets used pretty hard. Other than that your cats are going to love it