Ship, West Chester, and Millersville all have a good reputation, so I'd really base it on which location is better for you.

Millersville and West Chester definitely have more to do nearby than Ship, but Ship has WAY more stores and businesses than it did when I was there for undergrad (20+ years ago - I'm old). I enjoyed my time at Ship; just keep in mind that it doesn't have the shopping and restaurant options that the other 2 schools have.