From the video I posted, the ARJ-21 is fine to me. Uneventful, if not boring, a little noisy due to the engine placement, but it looks perfectly good for a regional jet. Maybe its not as cutting edge to a Bombadier or Embraer competitor but that's also fine, as long as it delivers the goods safely and efficiently. More Chinese airlines are starting to buy the jet.
I found a YouTube video of an ARJ-21 passenger flight. Its got nearly 2 million views by now after a year.