Thanks for your feedback. The goal of ReTrack was to show a more than a line on a map, and give more of an idea what the trail and your ride were like. The idea was never to watch hours of animation, but be able to pick out and replay the interesting bits of a ride.
I agree there is a lot further the animation could be taken; our aim was always to have something that could run on a smartphone, so that you could see the results while you were still out, but this is a big compromise compared to what would be possible on a high end console. The single sensor gives us a much more detailed track than a GPS trace, and detects when you are airborne so can show detail like jumps; not the detail we could get with multiple sensors, but not the price tag either.
In return for the Kickstarter funding we are offering the first batch of sensors at a discounted price. Very interesting to hear everyone’s views about what you do or don’t like about it.