greg911

I have been using the Performance Box for about a year now. It is great for lap times, allows you use splits to section off a specific turn to match times with and also will allow you to import your data into Google Earth so you can see you track lines and compare how you apexed corners. It does not log a lot of other data, but has several additional options available that I am not that familiar with.
I also play around once in a while with 0-60 times, 0-100-0, etc.

Ed Hughes

The G-Tech doesn't have GPS if I'm not mistaken.