Pzero is just Pirelli’s name for a sporting tyre and they vary significantly in their design, materials and construction and so cover a very broad range of tyres over a long span of time.
Generally though they tend to be auited to a warmer and drier climate, and compared to tyres from other manufacturers don’t get into their operating window so easily in cold wet weather like we have in the UK.
Generally the PS4S has a very broad operating window and hence the reputation it enjoys as it’s easier to switch in, and stay switched on than tyres from other manufacturers,
Pirelli PZero included.
My suggestion would be to leave all preconceptions behind because if you go in expecting them to be bad, then they will be - humans are wired to prove themselves right, it’s just the way we are.
Personally I’d invest in a set of winter tyres too, as in winter 4matic will help you build speed all year round, but all high performamce summer tyres will constrain your ability to lose that speed and steer.