It has been great! I am going to get another one, but this time I will get it w/ the controller (or whatever they call it). It does get really hot and heats up the soil to about 30*F above air temp. This has been really good for those seeds that need to stay around 80* to germinate. I just hope it will last for more than one year. The down side is that it is not water proof and needs to be kept dry around the connectors. Other than that it is great. I just have to keep everything in a tray to water and I would do that anyway.
i think the hydrofarm is good heat pad as well.. but im cheap too..LOL
i have couple spare big aquariums..so i have water in 8" couple of submersable heaters.. then elevated
tray and seed pots on that... lights on top of aquarium.. its good for keeping humidity up..and temps stay around
78F my tomatoes did great germinating..
dreaming for sping.. it snowed here..again.. sigh