Better than many reviews described!

no viewfinder
too big and heavy for an EVIL camera
distinctive design
poor ergonomics
fiddly rubber flap .... and much more ..

That's all right! And yet I have decided consciously for this idiosyncratic camera. I like the (admittedly polarizing) Design. Finally, a camera that protrudes from the usual Designeinheitsbrei. The advantage of Playmobil-like controls is that they can operate virtually blind after a short. Even at the fiddly rubber cover of the SD card you get used to. Over time they will incidentally smoother.

The image quality is excellent and corresponds to the current standard in this class and does not have to hide from derf competition.
The battery lasts loose a whole day by hundreds photos. And I can use all Pentax K-mount lenses. But best fit slim prime lenses to this camera.

Conclusion: certainly not mainstream camera for everyone. But who already has Pentaxobjektive gets with the K-01 an unusual alternative to a classic SLR.