The Aero II 12m is my first kite and I have been really pleased with it. I haven't tried any other makes or models so wouldn't know how it compares to them, but I've found it to be really easy to fly, good safety features and a decent wind range.
When I first started I used to go out in 13/18 knots and that would be fine, anymore and I couldn't control the power. Now I'm quite comfortable in 15/20 knots with gusts between 20/25.
Be interesting to see what other people think, especially if they have flown other kites, but IMO I'd say you won't be disappointed with it.