As the other long pips rubbers that Dr. Neubauer manufactures, Boomerang is also a frictionless rubber. Like its name, this rubber simply returns the opposite spin - with same quantity - of your opponents spin. It can’t do anything more than that.
I tried this rubber on a Dr.Neubauer Combination Effect paddle. I had a sponge size of 0.6 mm. The pips are soft and rubber is fast. I would have probably gone with an OX version (without sponge) if I knew the rub ...