I've had the SS's, the SS10's, the SS20's, and the Indy 500's. At $72-$74 a piece it's a good deal. They are mileage rated and can't remember for sure but think they are/were a 40,000 mile tire. I typically got about 30,000 on the SS series because of my driving habits but they do prorate mileage loss for your next set. In order of preference:
1. Indy 500
4. SS20 (really doesn't make sense, these were supposed to be the most upgraded and I thought they sucked.)
They don't make the SS series anymore so you don't have to worry about them. The Indy 500's have held corners very well, wet or dry, never worried about hydroplaning, but do be careful on snow and ice. They are good, but not great in that arena.
For those who have fought for it, freedom has a flavor the protected will never know. ~unknown