K-5-owners: Are you really satisfied

I have a 20D and a lot of Pentax lenses, but for the last one and a half year I have been using two Leicas, Digilux 2 and D-lux 4. Bot deliver good IQ. Now with the new Pentax K-5 out I have been considering to buy one and return to Pentax. Not the least its low-light quality is attractive.

It seems however that many k-5's have QC problems and - even more annoying - serious flash output issues. That is rather unacceptable for a camera on that price level. But who knows if it affects all K-5s. So my question to K-5 owners: are you really satisfied with the the out-of-the-box performance of the camera?