I’m finding it really bad.
Click drag to select some parts in the arrange page while the track is playing. Quite often the lassoo square which should give you an indication of the area you are selecting isn’t drawn at all - you just get the highlighted parts after you’ve released the mouse click.
Another issue I see when playing back a track, is that you cannot reliably select a tool from the palette in the arrange page using the right click mouse option - it takes a split second to open the palette up and then its slow highlighting the selected tool as you scroll through them. 4 out of 5 times you end up getting a tool you did not want to select.
Now here is what I’ve noticed - its far worse the bigger the arrange page.
If I have the arrange page filling the whole screen (Apple 30" Cinema) then the above happens all the time on a track. Cubase cannot keep up drawing the graphics properly.
If I resize the arrange page so its only filling half the screen, everything works much snappier.
So it would seem that there is an issue with Cubase’s graphics, because this should not be happening, even on an old computer - we’re not exactly talking cutting edge games graphics here!