I like the ultratherm heatpad as well. I have it on a stat, and its almost always on 100% power and it only gets to like 104-105 degrees when I check it with my heatgun (I think, can't remember, but its not hot is my point).
I have a herpstat and a hygrofarm. I like both. Recently my probe on the herpstat shorted and I lost the heat on my 2300$ pair of geckos...so now Im using the hygrofarm stat on them. I wouldn't use it with my most expensive species if I didn't trust it