ejackyou
Hamilton
The classic uses a bi-metallic strip thermostat. They have a on and off trip point. In this case there is a 18 degree spread from where the heater turns off and when it turns back on again. I have never had an issue with it. I have both digi and classic and they both work great.
My choice is the Classic, for just that reason, it sweeps through an 18 degree range instead of staying steady at one temperature like the digi, Similar to My Plenty. I believe that it was designed that way on purpose, and that the digi was introduced to appease the modern masses.