The back and forth with their customer service is a bit painful. Also, a sensor cost 116 USD, without any warranty.
Looking at the Helio heater, which I am currently using as a back up heater, this might be a better value if there is additional safety through another device (in my case the hydros). They have a 5 year warranty except for the controller fuse and magnet.
After all, I bought the aqualogic to not have to deal with these sudden temp issues (unless the heater element breaks down), and 2 years for the probe to last is not better than the competition, while also using old school technology without any offset point and a cumbersome programming.
Will probably switch to Helio now for both backup and main heater controller.