I'm running p6000's now on my 156. It came with them on already, but at the first opporuntiy i'll get them changed. They just don't seem to grip at the limit like my old goodyears did on my previous 156.
It really depends on your driving style to be honest.
Me, for example - i drive reasonably hard over B roads, usually on my own (without my nagging missus to reign me in!). If I drove 100% on motorways, then i'd stay with my P6000's, but i dont so i'll switch to something else with more lateral grip and less tendancy to lose it on greasy lanes. So far, they've lasted quite well. The inner rim doesnt seem to have worn to badly.....yet.......
Pirelli is a very good manufacturer all in all. I recall in the dim and distant past a test that autocar magazine ran on 2 cars and a whole range of tyres on each vehicle. They ran a BMW M3 and a ford focus round a track and test circuit. After all the tests, the differences in noise, lateral grip, wet/dry braking, skid pan driving etc etc were HUGE between all the different types of tyres. I believe Pirelli Pzero's won by a fair margin, except road noise.....
Wonder where that issue is...........???? Anyone remember it??
That's my 2p's worth - hope i don't get shot down like paj!