I like this product and Ben almost sold me one at Autosport back in January.
There was an awful lot of interest/buying of this product at Autosport by race teams and trackday fetishists alike.
The fact I can get into my car on a rainy/freezing cold morning and immediately know that the tyres are okay without turning my fingers black by unscrewing the dust covers every week is a bonus.
For trackdays it will be great to know when you can start to push the tyres a little more when they have warmed up without guessing and pushing it too far too soon.
What this little piece of kit will also do is tell you via the dispay when your tyres are ready to do too, as well as show you which one/s may have deflated.