Just took delivery on my sick day today -- feeling like crap but the B&H box was sure a nice pick me up.
I am sure the DFA*50 can take bad photos but it sure isn't going to be the fault of the lens! Very minor hunting in low-indoor light conditions but overall very responsive AF and a nice feel on the K-1. Most importantly though, absolutely gorgeous rendering and very crisp in focus detail down to 1.4 at a level I haven't seen before -- it's in a different class than my older A50/2.0 and Tak55/1.8 which are just not modern designs though they have some delicious distinct flavor of their own. Very slight CA is the only IQ issue I see wide open and it's gone by 2.8 for sure (I know, fix it in post is the usual refrain, but I've had serious issues with the DFA100macro when taking photos of things that are green or purple and the defringe tool wants to remove big chunks of color). I have a decent but not complete stable of modern zooms that are effective but not nearly as enjoyable to use, I'm super excited to get back into primes with modern designs!