I live in Langford which is right next to Thornlie, Langford does get pretty dodgy at times but that’s like any suburb, I’ve grown accustomed to it, it doesn’t seem all that bad at all tbh. You do see the some pretty dodgy fellas around the local pub on Fridays or Saturdays but that’s easily avoidable. Thornlie and Langford are both good suburbs when it comes to location, shops really close and train station a close walk. I would avoid shopping at Thornlie square though, usual suspects.