Loving IOS5, notifications are a big plus so much better now. My battery life seems greatly improved as well. First night after install went to bed at 100% woke up and still 100%. Didnt get that before. I also find everything just feels smoother an faster. Twitter custom notification sounds are the only thing i cant get work. Twitter notifs work find in notification centre. But The sounds just the standard annoying tone. anyone got this working yet could point me in the right direction? I'm part deaf so my own tones work better for me.