Have had my st3 from new, have done 10,000 miles now. Only issue was the aerial died so the satnav couldn't find a location, fixed under warranty no sweat. I don't do short journeys in the car say under 8 miles. I find the fuel consumption quite good for what it is really, average 350 miles to a tank with mixed driving, more with motorway and lighter use of the accelerator.
Struggles for grip in 1st & 2nd but is quick from 3rd onwards.

I really like it. Worth a test drive to anyone considering imo.