It does come off, as another reviewer noted, like a high school documentary film. The narration is a bit stultifying. If you want to learn about JS Bach's life, though, you will by watching this movie. The actors do the best they can, but the format could have been better--the narrator/scene/narrator/scene exposition gets a bit plodding after a while.
Costumes? Superb. Sets? Wonderful. With the exception of one actress whose makeup looks like she went to Lancome to get her face painted, and to Sassoon for her hair to be styled, the rest of the group look half-way believable.
There's enough of JS Bach's music peppered throughout the film that you'll get a nice helping of it, so that's a plus, too.
What's unfortunate, though, is that they clearly didn't spare the horses in terms of expense when it came to visual and auditory details...it's just a shame that the exposition of the story was so, well, lame.
Bottom line: Like Bach? Your time won't be wasted watching this film. If you're not madly in love with the guy and his music, though, this might not give you the "period drama" fix you seek.