Just wanted to put in my two cents and agree with everyone else: this is a pretty great show. Frankly, these 3 episodes are so good that it makes me even less impressed with the Guy Ritchie film. There are plenty of reasons to be turned off by that movie, but Benedict Cumberbatch and Martin Freeman are far better as Sherlock and Watson than Robert Downey, Jr. and Jude Law are.
Also, watching this show convinced me to check out Doctor Who, which was a very good idea indeed. I can't wait for the new season, but why do we have to wait until May for it? Sigh.