Infinity focus looks good on my K1.
Here's a jpg that is straight out of camera, no edits. Link:
Superstitions
Here's an edited version taken from the raw file and processed the way I like:
On another topic, there's been discussion about fringing and CA. The lens does have a bit of CA wide open, though not much. I think I can get CA from just about any lens with this scene. Link to full sized SOOC jpg:
Fridge
If anyone is curious, I took the same scene two years ago when I first got a lens that is something like 3 times the cost of the macro (DFA 85):
DFA*85 f1.4 When I uploaded the two SOOC jpgs for the macro, I noticed the earlier photos and thought the comparison interesting. I know, the two lenses are designed for entirely different purposes. I don't think I should embed the DFA 85 photo here, since it's really off-topic, but if you are interested, follow the link and you can see/perhaps appreciate how nice the macro is.
There's still no differentiation between the AW and WR versions of the lens. I noticed that SmugMug has it identified as the WR version, like LR does with the raw files. It doesn't make much difference to me now as I no longer own the WR one, but it would be nice.