The most smiles per mile mod?

[fooksm]

For me, the most smiles per hour must come from the Sprint Booster... I know that it doesn't actually give your Boxster any more power but what a great little device for making you realise that you don't actually need any more power. The three modes of operation are great and being able to switch it back to standard mode for when someone a little more reserved gets behind the wheel is a nice plus.

I know that some chip tuning also changes the egas peddal mappings so the result is the same but with extra power too, but ECU tuning costs much more money, raises your insurance premium and isn't exactly easy to take off the car when you sell it, unlike the sprint booster.