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Yes, Harry's lap timer is awesome, especially considering value.  Google satellite map overlays, Excel imports and charting, synching up with video, fantastic for the price.  Does what data acq apps costing $thousands just a few years ago do.  Very easy to use, worth every penny.  My son and I have been able to analyze our laps and compare corner apex speeds, late apex vs. momentum lines, etc.  I highly recommend it.