I do actually. Hence why i fly 747 first class baby.
that's exactly why. my turbo is a vnt17 which is at upped to around 23psi peak and 18psi hold (hey it's a 118,000 mile old turbo) and an issue which can occur is the vanes get clogged and causes overboost. with this i could see if it happened before it causes damage to the turbo.. also i can see any diverter valve problems, generally keep an eye on the health of my turbo.
i like it - http://www.youtube.com/watch?v=Z2Kj8-wZHNY
and say what you want it's my car at the end of the day.