Very happy with this microwave oven. Has many preprogramed cook settings and overall is easy to use. My previous unit did nothing to vent the front stove top burners, but the extended vent feature actually works great!  The exhaust fan is not too noisy and has four settings plus a timed shutoff feature which is nice. The only reason I did not give the unit five stars is because the extend a vent panel makes a vibration noise when the microwave is in use which is kind of annoying. Cured the problem with a wedge of folded paper but have to be careful when using the extended vent panel so I do not end up with a paper wedge in my food.