iOS 5 is just another must have iOS from apple, im loving it and what i like most is that they know what we like . So, there's total 200 new features on it (how come u don't know about it !) from which, notification on screen, camera options, mail, safari, iMessage are coolest of them.. we are aslo checking new every day . I strongly suggest it to UPGRADE !!!!
just missing SIRI in my iPhone and wish i cud have it as soon as possible.