If you get a combo unit be sure to check the power ratings. Ours came with a Dometic that took just about double the time for whatever the wife was baking with the convection feature. I replaced it with a Whirlpool Gold model that works very well and the wife is happy. This was important because we don't have a gas oven. Installation was different from the Dometic and I had to brace the back mounting bracket by using more screws into as much wood as I could find. I also braced the cabinet above it as best I could.
JimT
2020 Jayco Pinnacle 32RLTS, 2020 Ford F350, Platinum, 6.7 diesel, 4X4, CCLB, SRW, 12,400 GVWR