I have used Cubase a number of times to help me learn a piece (especially “tricky” parts) and I have found it an invaluable tool (More so than a metronome!). A recent example was when I was trying to learn the trill in a grade 1 exam piece. Although I listened to the CD over an over I just couldn’t play it. I entered the notes from that bar into Cubase and cycled it over and over at a much slower tempo (Something you can’t do with a CD) and played along. I slowly increased the tempo until I had it perfected.