Finished Air Gear a bit ago. An excellent lesson on how animators can stretch their time and money to good effect. The key scenes are quite nice, the middling scenes are marginally less animated but still crisp and the lesser scenes are very cheaply done (and look it). While the quality can fluctuate wildly, I can't say I disagree with any of their budgetary decisions.
There were numerous soft spots in the plot and the anime doesn't finish its prescribed storyline but it pulls off a sort of genuine energy that is the lifeblood of a shonen anime. It's also immensely helpful that the lead, while often indulging in a few arrogant moments, is actually a good guy.
I love character growth stories and Air Gear was no disappointment. Not only do the main characters grow into the standard shonen mold, so too do nearly all of the side characters. Each one gets a little time in the spotlight. Despite how little actual screen time they get, their side-stories never seem rushed.
Not perfect but definitely better than the sum of its parts and a fun watch when you're in the mood for a no-brainer.