Bob has heard a lot about iOS 7, and that it's more processor intensive and has had a dramatic effect on iPad 2's battery life. Leo has not heard this, and in fact he has an iPad Mini which is similar in spec to an iPad 2. Leo's battery life has not been effected by updating to iOS 7. Leo says it's nice to have iOS 7 because some apps have already been designed for it. There are some negatives to iOS 7, but Leo still recommends updating because Apple will push it on him sooner or later.