Seems pretty expensive compared to a reptile heater, fermwrap, heating pad etc.
I use a heating pad inside of a chest freezer on a two stage controller. Downside of a heating pad is they all have a 2 hour shutoff now, but in the chest freezer it never needs to run longer than that. Upside of a heating pad is they are around $8 at wal-mart.
Aquarium heaters are the cheapest alternative if you don't already have the temp controller.