I just got one. I hated it the first few days because I only tried maybe 10 minutes at a time.
A few weeks later the weather got supppperrrr nice, so I set out determined to get it. I got a ladder out and used that to help me onto it, then practiced balancing on each foot over and over until I could balance a minute or so on each. I then started balancing on one, then switching to other, and balancing on that, and then slowly started walking! It is super fun once you get the hang of it.
IT WILL TAKE TIME TO GET USED TO. DON'T GET IT EXPECTING TO MASTER IT IN AN HOUR.
Once you master balancing and walking a little, you can focus on bouncing. Depending on the line, you can bounce pretty high. Another plus is depending on the length you can set it up pretty much anywhere. My rachet broke because it was defected which sucks, but I'm getting a new one fo free sent to me. When it gets really warm I am going to set it up across this creek I have in my backyard (Maybe 15ft across) and flip into the water and see if I can walk across. Slacklining with good tunes, good friends, good drinks is a great way to spend an afternoon. I def recommend getting one, but it will take a few hours/days to get good at.