It takes a bit to get used to one knob controlling so many things, but after you use it a bit it is easy.  The interior of the lower oven is smaller than my previous oven due to the side rails on the shelving.  The only thing that I would say is a drawback is the resolution on the time for the microwave.  The timing only increments in 15 seconds.  I many times want something different.  For example, heating a roll for 10 seconds.  Just have to watch it to keep it from overcooking when I needed a different number.