after having used a slackline at my climbing wall for a while i finally decided to go out and buy a gibbon. Loads of fun. So easy to set up. However I would recommend finding someone you know who has one and trying it out before buying one. It's not as easy as it looks and it took me a few hours of practice until I could walk the whole line.
slacklining is so much fun. It helps mad with balance and air sense too, so that's good for skiing and pretty much any sport. I slackline like everyday, starting to be able to stay on it for as long as i want, flipping off of the line too.