I needed a new heater anyways, the one I'm using now was oversized for my fish tank. So I bought a smaller one for my tank.
I just wanted a remote probe sensor, so I don't have to open the reservoir, or remove a plant to get the temperature.
Plus I do IT for a living, I can't stand buying analog
In fact this time next year I'll probably have gone full nerd and built a remote monitoring suite either with usb sensors and a cheap computer or with something like raspberry pi.