I have a Slow Stick and it is fun even with a little wind. I don't know about 15 MPH though...I don't think the Slow Stick attains an airspeed of 15 MPH.

* Make sure you CG is set properly
* Try trimming it out on a calm day and then reset your neutral positions.

On a windy day you may need to fly at near full power to land. Then the trick is grabbing it before the wind flips it over and takes it to the next county!

Fun plane for the money. I'm flying glow also, but there is definitely something cool about an airplane that can fly as slow you you can walk.