TBF, i had a blast around a car park on one, and they felt quite good under the pedals, and soaked up the bumps well-ish, but (Perhaps the same for all air shocks) you either set the rear shock up for hard hits so not to bottom out all the time, or to soak up the small hits, but will bottom lots.
And who gives a rats arse about maintenance. All bikes need a fettle every now and then, and know what, fettling with bikes is good fun! Seconded to riding (And sex!).