Late 2012, refurb 2.3GHz i7 quad, USB 3, 16 GB RAM & dual 1TB drives (self-installed), running more-or-less 24/7 for about 2 years, including a fair chunk of video processing (mostly CPU work from deblocking), running Mavericks 10.9.5, plus a bunch of 3rd party software. No significant hardware or software problems.
Only things I don't like are
the 5400 RPM HDD, and the HD4000 iGPU. The drive is fixable (and fixed-ish, still have to move to an SSD,.. soon, soon, currently around ¢50/GB AUD for a 1TB, half that and I am in the SSD market big time...); and the iGPU is OK, a little laggy here and there when loaded up, but workable, plays 50GB Blu-Ray vids fine, which is my minimum benchmark. A HD 5000, or even 6000, would be nice, but 1st world problems and all.
(I run a Dell U2713H screen, which is very nice.
TIP: The 'H' version is worth every penny. Forget the standard base version, way too much light bleed.)
This Mini is easily the best overall value Mac I have ever had in 25 years, and arguably the best value Mac ever.
Happy customer, am I.
So, of course, Apple killed it. Coz,... well, who the &#%@$* knows. An iMac fetish?
Seriously considering picking up another one of the same model Mini on eBay, Amazon, etc. Current price around $1000 AUD. Just in case Apple don't fill that large gap between the current Mini and Pro.