So far I guess it is pretty good. It takes much longer to cook things than my previous oven, on bake or convection. Actually convection takes longer than bake! And yes, I have had my electrician check the power lines and the retailer sent out a technician to check everything out. So I guess I will just have to cook everything on a higher temp to get what I want.
My wife and I are enjoying this new in-wall oven. It is an improvement from our old one. We like the flat front touch controls and the fact it is a little bit larger on the inside from out old one.