Cessna 150 

JG, Merry Christmas.  I have flown with your vg's on my Cessna 150 for 8 months now, and have been very impressed with stall speed, better rudder control in crosswinds, and much improved slow flight aileron control. (See attached photo of wing vg's.)  Additionally, the aircraft made it through annual inspection without a question about the vg's. 

Chip