I had put off viewing this anime for some time, from the description I thought it was a number of different short stories. The concept definitely got me after episode one.
Story:
To me, the story was unique. While I do agree that it did seem a bit episodic, those episodes were rather interesting. I get the feeling that there was quite a bit more that could have been done, and may have been done with the Manga, but it definately was a "page turner". The main plot had a fantastic number of twists and turns, for a ride that I would recommend.
Art/Sound: Nothing that really stands out. Perhaps its more in the realistic and dated drawing style, but not too old.
Character: There were a decent number of characters. The story didn't delve too much into the non primary characters. It felt like there was a prequel that explained all of the relationships in the past.
Enjoyment: The only way I can describe this is that it is a page turner. I think that great anime, are one that can make you want to keep on watching after the first episode. I enjoyed the medical mysteries; the little romance that they had, and the overall pace.