I bought my car with these tyres fitted. The first thing I noticed was juddering from the tyres at speeds between 70 and 80, really inconvenient for motorway journeys. Had the balance and tracking checked but no improvement, it seems that the tread design on these tyres contributes to the effect.
The next thing I noticed, when trying to turn from a junction, on an incline, in damp conditions, was that the performance in the wet is shockingly bad. Lots of spinning, a bit of squealing but precious little forward motion. This was confirmed when having to brake more heavily than usual on the approach to a roundabout in the rain. The tyres had virtually no grip, causing the car to slide even with ABS activating. It is possible to drive more cautiously in the wet, as I'm sure some readers will suggest, but there is always the risk of having to brake unexpectedly and I would not trust these tyres to keep me safe.
I will be replacing them with something more dependable just as soon as I can afford to.