I've been coding in Slick2D for almost 2 years now. I have, but only recently. Since I've started making tutorials on Slick2D, I've noticed that their TiledMap class is more complex to use than it should be, so I just re-wrote my own map loader + renderer :). For my own projects I like to code everything with as little dependencies to slick2d as possible. I only use Sound, Music, Image, SpriteSheet, and BasicGame from Slick2D.