Been using this for a while... Gitbook is a life saver.. Let me tell you the best part of this.. It has a little analytics center which you can use to find what people are looking for in the documentation.. Supervised is used by 12K+ users globally and I was able to find that most people were stuck at the upgrading part because it had much more visits than any other page..
Total life saver for devs.. Love this!
Incredible work by the GitBook team. Love the new GitBook Lens feature. It decreases the amount of support tickets that we receive while providing great answers. A bit hard to find in the search UI as users might not be familiar with "Lens".
I build software tools and use GitBook for documentation. It's amazing, I recommend it to all of my colleagues doing similar work. I honestly don't know what I would do without it.