Had a flip-phone for a long time when I was younger, I wouldn't reccomend them over a smart phone. They are cute, but they can't do apps like smartphones can.
Y'all think it would be easy to go back, but you basically cannot access browsers or anything. I know I personally need my smartphone because I work on it and my apps are usually things like Kindle for textbooks, Delta and AA for my flights, a few camera apps for fixing coloring/lighting issues in photos, and task/planning apps. Can't say my life would be easier without them long term or short term.
My problem is that I use my phone as if it was a mini computer. I browse the internet far more than I text anyone so going back would render it basically useless. xP