I frequently switch between browsers from time to time and it can be a pain to keep all the same bookmarks in each. Sure most browsers allow you to import bookmarks now, but it's still extra work figuring out which ones are missing or just replacing all the bookmarks in a browser each time. This takes all the work out of it and allows you to keep things in order with minimal effort. I've also tried Bookdog but it's much more expensive, ugly, and is not as simple to use. As far as I can tell, Bookit is perfect.