So many reviews have already said what I wanted to say, so I'll just add that as a musician who plays the piano and trumpet (and has done so for close to 20 years) I found this series to be some of the best television I've ever watched. The idea of music connecting people, the romance plot, the bromance plot, and so much else resonated with me on a very deep level that made my cry tears of joy and sadness.
Yoko Kanno (of Cowboy Bebop fame) wrote and arranged the music for this and it is as spectacular as you could imagine. If you are a fan of jazz (or have an inkling that you could enjoy jazz) this will be a real treat for you.
Overall, this is one of the best series I've seen in a quite awhile and I recommend it to everyone wholeheartedly.
