I think this is a good transfer, although I agree with 'hellodavey' and 'K Oppegaard' - the film is not quite what it should be in places (although I think this is due to fairly subtle DNR, not the bitrate, which I think is ample for such a film).
I suppose if you don't know the film and expect a visual feast of background detail throughout, you may be disappointed, since the camera sometimes has a shallow field of focus, with only the very foreground completely in focus. However, this is primarily because the focus is on the player who is currently conversing (or narrating), which is quite appropriate for a film derived from a play. Amadeus is, after all, justly praised for it's great interplay and dialogue.
All that aside, I think it's important to emphasize that overall this is a quite a good transfer, and an improvement, and although DNR is always unwelcome, I don't think it's too obvious here.
Of equal importance, the 'third main character' which is the music, is also improved.
As a general point, I would say even a small improvement is worth having for a film you like, but in this case the improvement is noticeable. Give it a rent and see for yourself!