The best thing about tome is that it is very easy to use and has a lot of customization options.
It's also free! I've been using tome for my company (we're a small organization) for a few years now, and I can say that it works great. There are some minor issues with the software, but nothing major. If you want an easy tool to create your own online user manual or any other kind of technical documentation, then tome is the way to go! We've been able to create our own online user manual and documentation in no time at all, without having to pay someone else.