Having worked for Bridgestone for almost 9 yrs untill 2012 I wanted to try Bridgestone's latest 4 season product. Now reviewing a product is tricky, it all depends on what you had before and what your personal feelings and preferences are about certain characteristics of a tire.
Currently I'm driving a BMW 320d EfficientDynamics model, 163hp/380Nm on the rear wheels. I bought the car with Goodyear EfficientGrip's on the front, and Conti PremiumContact's on the rear. All tires were RunFlat models, so extremely stiff sidewalls to cope with punctures. Ride comfort was a bit harsh sometimes, but handling like a sportscar. Mostly moderate highway driving for work, doing 1000km a week. Tires lasted roughly 80.000km
Then onto the Bridgestones themselves. I bought the new Driveguard ones because i wanted the runflat option. Your car needs a TPMS system for that though. I've done some 5000km now, tires are performing just fine. So far excellent grip in wet conditions! In dry it also seems to behave like a normal summer tire. They're not as ridgid as the previous runflats, so steering is a bit less razor sharp, but the comfort improved! Fuel consumption is slightly higher, but with this car i'm still averaging 5liters per 100km, so still very good. Havent tried them in snow or ice yet. Noise is pretty similar compared to my summer tires, only the frequency is a bit lower. Only with certain long exits on the highway theres this slight rumbling noise which hints you that you're driving something else than summer tires. So far so good! I can't say anything about wear yet, but as it's a 4 season tire, I expect them to wear a bit faster than average.
So far, I'm very impressed by the wet performance!
As for the review by the Golf GTD owner below here, mate, step off the accelerator because my BMW has similar power levels and I think they will last about 25k-30k miles...