Hi m8
Guys who do no track work are seeing 30k+ miles from a set on 911's.
Its not just the longest lasting tyre I've ever experienced but also the best performance road tyre by absolute miles, nothing comes close to the wet/dry grip they offer, but the most important factor the confidence and feedback they offer.
Pricing wise, they are similar to other premium tyres, check Camskill, lovetyres etc. etc.
Very interesting, sounds like the option to go for.
OPC Guildford quoted me £320 per tyre for Bridgestone N1's I think and no doubt they'll do the same when it comes round to me getting the 111 point check.