I agree with Evan.

We are working very hard since over one year on refining and improving all the features of our vario. Its complex and we are very pleased by the results so far. What we do with our sensors has never been done before and leads to many new things we have to learn. We do not use more than 50% of its potential so far and yet it is really impressing.

Check out our Youtube channel (videos don't really give you the feeling but they at least show how the display looks): http://www.youtube.com/user/ButterflyAvionics

Best wishes
Marc
Butterfly Avionics