I have a Nano Flo and a Denon from Esprit. The Nano Flo was the glider version and was pretty bad quality(the glue joints in the center of the wing were butt joint glued and failed before the first flight) except for the fuselage. I built a different glider around the fuselage. I have a Denon with the recomended Mega 16/16/4. It was given to me because I have a lot of fast planes and the person that bought it considered it too fast for him. I love the plane, its not excessivly fast and I would actually prefer a 16/15/3 eith a 4.7X4.7 to bump up the speed... It is an extremly good flying glider and would be my recommendation...