Got mine in the post today.
Very nice small camera - looks to be the same internals as the Yi Compact (it even worked in the app with me mistakenly selecting the compact).
I quite like the smaller size, and for some cars it'll work well. Still prefer the Yi Smart, or the Ultra, but for the price, the Mini is a good option to have.
I've been using one today in my truck.
So far, looks pretty good for a budget cam for some applications. It's use is pretty limited to a more vertical windscreen like in a truck, SUV, van, or pickup.
The lens doesn't adjust down enough for sloped windshields. Will have to see how it does at night. It's stuck up in the windshield next to an A119v2, roughly same size.
Recorded audio seems ok. The wifi app works as well as most of them do, at least on android.