I have Avon ZZ5s on the front of the Mini. They are at the limit after 11,500 miles.
The tyres they replaced were Avon ZZ3s that covered 16,000 miles on the front.
The rear tyres that were put on along with the first set of ZZ3s are still going strong with around 3mm left after 27,500 miles.
The ZZ5s are nowhere near as good as the older ZZ3s.
Wont be buying them again.