One of my complaints about iPad is its lowest brightness being too bright in stock. I didn't know there was this setting under accessibility and it's great for reading things in dark. (image found through Google, http://www.tilrc.org/assests/news/0111news/0111tech26.html) I was thinking about installing a Cydia app for this but for now I'm very happy reading stuff on my iPad without disturbing my wife or my eyes. I can also set the toggle with the triple click of the home button which is super handy. I wish I knew about it sooner.