Given that it's K-mount and uses the same batteries, flashes and GPS as my K5, I'll probably sell my Pen kit and use this instead. Image quality will definitely be better (match or exceed my K5), and my small primes will work great on it. The price is nice, too. $250 cheaper than the new Olympus offering should help sell a few, though the usual complaints about lack of a viewfinder will stop some people from buying.
Wish it was a tad smaller, but only so much you can do and keep the same mount.
BTW, it's available for pre-order from
B&H and
Adorama.