The Hog Bipe is probably the easiest to fly.

The CGM Ultimate is an easier build than the GP Skybolt

But the Skybolt has the fastest "Out-of-the-car-and-into-the-air" time.

Here are the vids tmproff mentioned:

http://204.96.183.34/Skybolt/Videos/

PS, this is with a YS 91