What has driven us nuts with for eight years with this GE Profile glass-top is the impossibility of setting a temperature that we can measure or trust. We repeatedly burn things or overboil, and even buying an infra-red thermometer didn't help. Every burner seems to - not seems, it absolutely - overshoots the temp setting and heats up far beyond what we think we have set.
It has a ton of what my engineer son says is "thermal inertia" which is a a fancy term for being slow to heat up and extremely slow to cool down. In fact, if a recipe calls for reducing the heat during cooking, we are obliged to move the pot to a cold burner and start it up to a (we hope) lower setting.
I can't have gas in my condo; I've shopped induction cooktops, but their dimensions would require replacing not only half my granite countertop but also the custom cabinets below the cooktop. My other son no longer owns the cabinet shop in a neighboring town that we used to make our cabinets (he's back in Texas, and back in the heavy industrial valve bidness.)
So we're stuck with this miserable thing.
Several years ago we were so desperate we ordered a service call.. The tech came and spent 45 minutes pushing all the controls and measuring all the responses, and finally said "It's doing exactly what it's supposed to do." He seemed a little embarrased, and only charged us the minimum service-call charge.