What I took away from this case study
Features add value
Even with an established product such as iMessage, new features can add additional value by anticipating user’s needs.
Users love iMessage
Although there is always room for improvement, most of the opinions of iMessage I received through my research were very positive.
Design intuitively
Users should be able to quickly adapt a new feature and not have to go out of their way to figure out how to use it.
Meet user expectation
When working with an established product, it’s important to meet user expectations and keep the functionality similar to what they already know.