| Damn, he just sounds amazing. What I really love is how matter of fact it is. It is pretty clear how it is done, you just need to work on it for few decades, and have a set up so the lower strings can sing with the bow.
While it is for sure very difficult what Bach has over equally complex pieces is the perfection of the line. Even if a note is hard to get your ear and mind lead you to it because it HAS to be that note, the C# to E in the third bar would be a lot harder otherwise, but in that line it just must go there.
I have the first few bars memorized and I like to use it as a warm up in both registers. | 
