No issues on mine yet, but those people who have bluetooth and wifi issues, I was wondering if you can be more specific. It would be worth reproducing by others to see if this is a design issue or just an issue with your machine.
I've now had a Bluetooth/Trackpad/Keyboard issue with two minis in a row. It is highly intermittent. I can go an entire day with no, or very little, interruption, and then have a recurring problem that might last an hour or three. I'm beginning to think that it may be environmental, in the sense of being related to other electrics in the immediate area. Tomorrow, I want to try to figure out whether running my external GPU has something to do with it. Yesterday, I had the eGPU off for most of the day and had no problem. Today it was on and I've had intermittent interruptions.
I think that it is unlikely that this is machine specific, if only because it has happened with two minis in succession. My approach at this point is to see whether I can resolve this via physical placement of the computer in relation to other devices.
It would be helpful to know whether Apple recognises this as an issue and whether a firmware change could solve the problem. If not, and if I can't resolve this, the mini will go back and I'll look for an alternative. But my gut feeling at the moment is that this is about electrical interference and that I may be able to resolve the issue by removing sources of interference.
I'm not convinced that discussing this on the forum is useful. To date, there's been a lot of whingeing, but no constructive analysis, at least that I've seen.