TT100s were, and still are, good tyres on the bikes they were designed for and their compounds have been updated over the years. I used to production race a CB500 on them and at the time they were the best tyres available. As has been said already, modern tyres will out perform 99% of riders 99% of the time and there is more bollocks talked about tyres (plus oils and screens) than anything else. You choose the tyres best suited to the type of riding you do I.e. all road (the majority?), road and some dirt or road and lots of dirt. Advice and comments on here should enable most riders to make the best choice. The biggest question is often where to get them at the best prices.