I am impressed with how efficiently this scratches. It worked great on my laptop. I'm not a DJ but I was up and running within seconds and my wife was jumping up and down dancing. GREAT work :) and thanks for sharing!! So fun. I got a couple of small glitches when setting cue points, that wasnt working right, and when a track ran out i got a slight high pitched whine if that channel was still running. But overall, very responsive and usable. Im shocked how FAST it is. Rivals internal DJ apps and scratches fantastic.