You should definitely see drh present it in person. He's giving a talk about it in universities around the world, seen it a couple years back, in Poland. It's incredible what effort goes into reliability of what seems such a small thing.

Btw, the very same day he persuaded me to move to Fossil.

Edit: just to be clear, you should see it for all the good ideas he's explaining. Not for some marketing of a piece o of software.