I love playing with Jett because she's agile and she's got a very good set of abilities that can be used offensively and defensively. For example, if you're low on health and your teammates are not there to help you out, you can use her dash to quickly getaway from enemies, or if you want to take a risky angle, you can use her smoke to create a cover. My advice for those who want to start playing with Jett is to practice with her abilities, especially her dash, and learn to use it effectively. Also, use her ultimate during clutch situations to have a big impact on the game.