This product has so many features I haven't had a chance to try them all. This was a nice upgrade from my 20-yr old set. The displays are easy to use. The most common functions come up as pre-sets, but it is easy to add you own custom time and temp. I have used the "no pre-heat" function, convection heating, and regular heating. My previous wall ovens (same size), were not deep enough to comfortably fit a large pizza stone, but these are deeper and work great. 
One note - There are 3 racks in each oven (6 total), so I took two out to store in a drawer underneath, leaving room for a taller casserole.