It has been a long run, and all I can say is that it was 'good'. If the plot wasn't all over the place, then I might have given it a higher score, but since there was so much happening at the same time, it often left me confused. The art is fantastic though; I really can't get enough of the female characters - they're all just so beautifully drawn (e.g. cover of the last chapter). But unfortunately, art alone can't define a good manga, so with that, Air Gear will get a 7.
That said, I do look forward to any future work of his. I adored his art ever since Tenjou Tenge, so again I'll follow him for his art alone. And maybe, just maybe, will his story improve in the next one.