I was kidding around with Papi61 regarding it being too accurate.
The way Cubase deals with translating midi data into Score (sheet music) data is not liked by all. If you play something in on a midi keyboard, or use the Audio to Midi function you will have to massage the Score to make it look good. And there is a learning curve. But you can get really good results. I do lead sheets and charts for small ensembles.
You really should download the Cubase trial version, you get the manual and the full program and you can play with it for a month. That will help you understand what it does exactly.