I got a chance to fly today, used the 15x4w first flight and then switched to an APC 14x6. The pull out of a hover was much quicker, but the lack of prop wash on the control surfaces made it more difficult to hold the hover. It took a lot more surface throw to accomplish the same amount of response in the air. I did not get a chane to try the 14x4w, I think I will try the 15x4 (not w) also to see if I get the best of both worlds. I know I want the pull out of the 14x6 with the wash of the 15x4w, finding that will be difficult.