I've seen two personally, and was quite torn between this (5" version in White) pistol and the S&W TRR8 I ended up with. The first was a black 4" with ergonomics that really impressed me. I'd not owned a revolver before, so I was a blank slate as far as gun configuration goes. The cylinder release was awesome, the lever pulls down like a cocking lever (way easier than a push S&W type) and the high ride of the hand on the grip allows your shooting index finger to push the cylinder out.
The downsides on this pistol (and brand, I guess) is that quality seems hit or miss. The first pistol felt great on both DA and SA, but there were unpolished band saw striations where the forcing cone meets the cylinder, an area where tolerances of .001 or better MUST be maintained to prevent excessive gas release. Not good.
The second pistol I held (a 5" black) had a much easier DA trigger pull, but when pulling the cocking lever back for SA, I felt something binding up inside pretty bad, such that I worried I would break something before the hammer finally latched. This one had a very creepy SA trigger, too.
Personally, I will hold back until a 2nd generation comes out (would probably be fantastic) or Chiappa changes their production QC such that reports of consistent quality start coming out. For now, their quality seems Taurus-like (.03" tolerances most places) but at a much higher price point.