We through out the old Micro/oven and got Americas most sold well maybe the most sold in the world model Sharp R1874. Costs slightly more than Walmart quality ones but is just works.
If the panel goes bad, or if something else brakes there is always parts. Think it has been around for at least 10 years. I paid $400 for it at HomeDepot.
We bought a microwave for our stick and brick home 10 years ago, branded Dacor and paid over $1,000 - turned out to be a Sharp R1874 inside!
Vent does not line up 100% but took one hour for our installation guy to mount it.