After trying the S1 and finding it incredible value for money I was convinced to try the S2. The molds seem to have been improved as there is no slop in any of the original areas the S1 had and so far no diff leaks. After some small upgrades, spring and oil adjustments the chassis is tight and responsive with plenty of grip. Spares are cheap and when constructed right the car can survive quite spectacular crashes.
Overall : Recommended for all budget TC enthusiasts!