Yup, I had never heard of it till I came this forum, but now take 20mg Methylcobalamine a day and 450mg Benfotiamin.
Pre-surgery I found it a life saver from the pain of PN. When I missed a couple of days my hand (ulnar nerve PN) would REALLY start to claw, and have the painful swelling fingers. The second I got back on it, the swelling subsided and although the 'claw' did not completely heal (that is going to take a while) if became so much more bearable.
I am about 3 weeks post-operation (and I am no martyr) and it is still doing it's magic.
The only difference is to be seen, now that it has a fighting chance at repair.
You can read more detail of my experience in the thread that I hijacked.
Here