Our older replacement controller from 2018 was giving us some issues with the heating element, so we took a chance on this new digital controller. It's very nice and allows us to control how much PEMF and for longer periods of time. Our other controller didn't have this function. The heating element is working better, however it's still not heating properly. We think it could also be a wiring issue inside the mat itself. I have to say customer service is very responsive and have been great to work with. We may end up having to have our mat repaired eventually, hopefully locally.