Nexus 4 Screen Q's

Nexus owners unite!

At the end of the month I'm finally getting my Nexus 4, needless to say I'm pretty stoked to join the N4 herd. I'd just like to find out though; for those that have owned one for a while now how have you enjoyed the N4's screen? In particular;

  1. How is sunlight legibility?
  2. How is auto-brightness in general? Does the brightness match the environment effectively?
  3. I read somewhere about a minimum brightness bug where the backlight would turn off completely - is that still an issue for some?
  4. Finally, have you attempted any manual calibration? If yes, does extra calibration make much difference (i.e. would you recommend that I should pursue this)?

Thanks in advance :)

Jon D