I enjoyed it, my favorite episode was probably a Scandal in Belgravia. All the actors do a very good job.
I really like Molly, who I don't think is based on anyone from the original books.
It's interesting how Artistic inspiration goes in circles, House M.D. was clearly based on Holmes a great deal, and it's also clearly influenced the Holmes Adaptations that have been made since.
On the question of how Sherlock survived the fall.. We're kind of supposed to see the third answer shown at the real one, but it's still a little ambiguous. I found the the 3rd scene shown the most absurd frankly, there is no way that couldn't have had witnesses who weren't in on it.
All 3 theories start with the same wrong assumption I think, that Sherlock surviving means he didn't hit the pavement. It could be a simply matter of him doing something when he landed to minimize the damage.
Now the big mystery is If and ind if so How did Moriarty survive. Which I find interesting because he killed himself the same away Henri Belcamp did in John Devil. And while Feval never made a sequel to that I think he was going to if the novel had been more successful at the time.
People accidentally survive shooting themselves through the Mouth like that quite often. Anything you can do by accident someone as smart as Moriarty could probably do on purpose.
I found the shows take on Charles Augustus Miverlton (Magnussen). He's a total contorl freak and literally marks his territory.
The reveal of how his "Files" actually works reminded my of The Colonel's Treasure a little bit. It's Psychological rather then Supernatural, but the premise is the same, it kind of doesn't actually exist. He is the Treasure.