I bought a Buster II 3.0 a few months ago and since I only do static flying this kite is fine for me in low to medium wind but when it picks up this kite is to powerful for me. So I finally managed to convince the wife I need a high wind kite. I wondered if anyone could recomend one of the two above (Sting or LD Stunt) or any other recomendations perhaps? All help greatly appreciated!

I have not flown the Flexi Sting, but I have an Ozone LD Stunt 1.5. It is a great kite - stable, quick, and turns really fast with just a flick of the wrist on the brake. "Stunt" is no misnomer. Rarely overflies the zenith - a bit of brake drops it right back into the window. If it collapses and drops, it's easy to shake out midair get it re-inflated. Hangs out and hovers at the edge of the window nicely as well.

My 7 year old son learned to fly it on the Washington coast this summer. he controls it well in winds up to about 12 mph, and wants to ski behind it his winter in Minnesota. It can pull me on my butt on packed sand or grass in 25+ mph winds when flown agressively (I weigh 128 lb). It is now also my "super high wind" buggy engine. Build quality is excellent.

krumly

I bought a Sting 1.2 for my wife early this summer, with the idea it would be a good 4-line trainer kite.
Its build quality is very good; it has taken some hard ground crashes and survived intact. You know the type: when the kite hits the ground and goes WHUMP! and you think Ouch!
The lines are color coded to match the nice padded handles, and marked for brake and power.
In medium winds it is very responsive, easy to fly. Just pull the handle a little and it turns.
In higher winds, (25ish) it moves quickly. Just a little brake input to turn the kite and it reacts. It generates a good feel of pull in the upper wind range for its size. It will climb to the top of the zenith quickly and wait for input. Same with the outer edges of the window, I've never had it over fly them. It can spin very fast if you linger on the brake too long.
In 18 – 20 mph inland gusty winds I’ve had it make me step a few paces to keep balanced (I’m 11 stones) and I think on a hard surface it would pull my buggy.
When landing straight down wind, I’m firm with the brakes: the kite will appear to deflate, the tips and bottom edge kind of fold in a tiny bit, the kite wants to rotate very easily at this point, and “feathering” the brakes seems to be in order till it sits down.

I had a friend tell me: If you get good at flying these smaller kites (as fast as they react) you can fly pretty much anything.

Have fun with whichever one you chose!