I had chosen a different brand of wall oven for it's slightly retro look, but after reading reviews, switched to Bosch.  Almost all other brands of wall ovens get complaints about the amount of noise the fan creates. Bosch consistently got fantastic reviews. So far so good although our remodel isn't complete enough for me to have cooked in the oven yet. We did do the first heat up to burn off the oils as per instruction from the gentlemen who installed it for us. I was impressed with how quiet it was. I found the sensation of fan blowing at me from right under the controls, a little disconcerting, but I guess a wall oven must vent SOMEWHERE and I won't be standing infront of it like one would have to do with a range.