Bought this halfway through the day at QR on wednesday. I have to say for the price ($10) it is quite outstanding. Plenty of features including: Customisable split markers - just tap anywhere on the map to set your marker(s). Apply new markers to old sessions. Multiple User Profiles Multiple Vehicle profiles Multiple Vehicle setups with comprehensive notes for: Brakes, Suspension, Engine (Maps, mixtures, gear ratios), Tyres (brand, compound, profile, pressures). I set the app up to start once I cross the first split marker and put the phone in the trunk and pressed start. Lap times show red lines for braking points, green for acceleration and blue for neutral points. Maps overlay straight on top of google maps so you can see all of this information layered on top of the satellite image of the track. G-meter for Accel & Lateral G forces Lap info highlights best time for the session and also shows top speed and average speed. You can also export all data to microsoft excel tables or .jpg files if you wish! Only got it setup and working for my last session but can't wait to use it at lakeside sometime soon. Its great because i've been to QR 3 times and never know what times I am posting.