Let's put it this way, I won't go to a tire store that does not use a GSP9700.
This spring I had a brand new set of Bridgestone Pole Position S03s put on by a shop with no GSP9700 and the whole car shook really bad with the new tire. Worse than it did with the old tires after 50k on them.
The shop checked the balance again and told me it was all in my imagination, thus losing my business forever.
I took the car to a different shop that uses a 9700 and guess what? The wobble was gone (along with $71 more). From now on, I have the job done right the first time.
