Practice that carries over
You get better at table tennis through repetition: see the ball, play the stroke, see what happened, adjust. At the club that loop runs a couple of evenings a week. With Loopspin it runs whenever you have twenty minutes, and you don't need a table or a partner. It's also a good way to stay active between sessions.
Practice only carries over if the other side behaves like the real thing. That's why Loopspin's opponents are learned from real players and its physics is measured against real balls, so what you practise at home is what you'll meet at the club.