Only just died after 8+ years.

I have no idea how old our microwave was when we acquired it with the house in 2014, but we have been using the microwave function for eight years and it has only stopped working this week: light and motor are fine, but no heating action.
It has only fairly coarse divisions of time, so it would have been more annoying when the kids were tiny (heating baby milk needs time control measured in seconds, not ten second intervals), but for ordinary family use, defrosting, reheating, making hot drinks etc., it did just fine. It's quite compact too.
I can't comment on the grill function as we never used it.