Nice if you NEED to make your bookmarks available for use on other computers, but if you never travel, never use any computer but your own, it's hardly worth the effort (i.e., waiting for it to update). Either the server is exceptionally slow or exceptionally busy, neither of which are conducive to general on-the-fly bookmarking.

Help is minimal: too much time is spent on what it can do, instead of how to do it. It took me a while to find out, but no, you're not stuck with the default category set. Yes, you can add/remove categories, even create your own, both on the very slow website.

I'll recommend it ONLY if you NEED it. In its present state, I wouldn't recommend it for general bookmarking.

If this is going to be generally useful, Samfind really needs to speed things up, and the instructions need to be broadened.