To me this is one of those series to be watched on a certain mood, definitely not after coming from your lousy work that you don't like (if you're in that situation), or after coming from running when the brain is too alert. I watched all episodes late at night and enjoyed it very much, maybe because of the late night tranquility.
I didn't know the main actress and she impressed me a lot, on how natural and real her performance is, specially on the laughs. I think she is fantastic and will search more of her work.
The best things of this show is in the details. If you watch it for the general story that it is and expect a certain outcome, you might find that there is no sense of direction or that it didn't work... but if you just let it go with the flow, you will certainly find some gems regarding the psychology and behavior of the characters. I also loved the soundtrack, it makes the surreal moments funny and the happy moments really sweet.