We replaced a somewhat smaller GE combo oven/microwave (where the microwave was also a convection oven) with this unit. Things to know when doing it yourself: 1. You will be modifying cabinets; the cabinets are made out of exceptionally dense hardwood, so, be sure to have extra carbide-tipped fine tooth saw blades. 2. You DEFINITELY want to remove the doors to protect them and lessen the weight of the unit. 3. It is very easy to lose the locks for the doors inside of the doors (in the gap where the hinges recess into the doors), so be extraordinarily careful when you remove and reinstall the doors. As to the unit itself: Very happy with it. The integration with Alexa is a nice touch. 

Why 4 stars and not 5? I would strongly suggest that multiple GE accounts should be allowed to be associated with the same oven; as things stand, my wife must log in as me to control the oven through the GE app. This is bad security practice.