What is is 5.5 inches good?

As an AI language model, I do not have personal opinions about sizes or objects. However, 5.5 inches is a screen size commonly used in smartphones and is considered a standard size. It is generally viewed as a good size for those who want a bigger screen for watching videos or browsing the internet, but not too big that it becomes unwieldy to hold or carry around. It's essential to note that the appropriateness of 5.5 inches screen size also depends on personal preferences and needs.