The show is really a-typical and doesn't follow what I feel is 'traditional' in American television. If you've seen murder-shows like Bones or CSI, then SHerlock really is NOTHING like those.
It's British writing a bit different. Character-based mostly, great plots. People feel more real, and they don't shove STRESS down your throat at every moment.
Good flowing. Like all BBC shows, really. (I find.)
I do suggest watching the first episode. "A Study in Pink". I really do. There are only three episodes to the first Season of Sherlock as well. So it's not a huge commitment.
DEFIANTLY worth it though. It's fantastic. :]
I suggest!
(I figured I'd give you an explanation rather than just a OMGIT'STHEBESTWATCHITTttt)