Are there any benefits of having a 2 line function if your going to use it to practice alone ? I'm on the fence about either SP Star or SP Quest. If you look at the video on the website, the 2 line feed seems useful when you use the wide angles to alternate backhand/forehand. Can you do the same angles with the random oscillation? I also thought the SP Quest sounded promising with the vertical oscillation but I read it doesn't work all that well.
I decided to dismiss the Tennis Tutor as an option. Local owner is asking 200$ more than the sports tutor MSRP, which I think is a ripoff. I'm also not too fond of the bulky black luggage design and short handle. Not saying it's not a good machine, but for the price, the SP appeals more to me.