My first flight was with a prototype of the Apco Nestra at the Dead Sea. 
I even flew slightly overloaded and yet the performance of the wing was already impressive. 
The Nestra flew remarkably dynamically and efficiently and gave me the feeling of hanging under a higher classified wing. 
The steering is absolutely precise and it feels like a razor blade cutting through the air.
I flew with some C and even D category gliders and I felt the Nestra was on par with those gliders. 
I'm used to hanging on a few lines from my Enzo, but seeing a similar picture on an En-B wing is truly revolutionary.