I use both ProProducts and Reptile Basics heat panels (with Herpstats) and they work basically the same. I have settled in to buying ProProducts panels as I need more.
I mount the probe a few inches under the panel (not necessarily in the center, but at least a little bit directly down from the panel) on a DIY mount made from aluminum stock, bolted securely to the wall of the enclosure and with the probe thoroughly attached (zip ties work well).