One of my friends grew up as a JW. I have a lot of opinions about the way she was forced to live her life, and I won't post them all here in case it was just her family's experience and not representative of the faith as a whole.
One thing I'll say is that they are very persistent. When I lived in Korea, I had Korean JWs come to my door to preach. I'm white, blonde and can't speak any Korean (I do know enough to say "no thank you" however) and despite my limited language skills, and obvious attempts to close the door, they still wanted to spend time talking to me.