1. When it came the fan for cooling the outside of the oven was defective. It was replaced but it remains incredibly noisy. We have tolerated it but... The convection fan is fine.
2. The igniters are a real problem. They short out to the steel top so there is not enough spark at the right place to light the flame. Some work some don't, some work sometimes. Careful cleaning can help but not on all.
3. standard problem cleaning the stove top. 
Otherwise it is pretty good...if you don't mind the oven noise.