its quite alright,...
i've been using a dumb m42 adapter and pentax asahi tamukar lenses,... feels just like shooting an old school camera. its actually one of my favorite things about it,... very few buttons to get in the way, focus view the evf or the lcd on the back, both of which have nice resolution,... set your iso, like you do with film, head out, set aperture on lens, one button for the shutter speed and thats it.
its worth heading to your local electronics store to have a play around with.