Easier to use than Xmarks, mostly Rated 4 out of 5 stars
Syncing with Xmarks is always hit and miss when doing a simple sync/merge and the option to simply upload bookmarks from your "golden" machine and download to the others requires going to their website.
Eversync does a better job of this, but they, too, hide the simple upload/download actions under "options". Why?
To make it worse, when I do a full download of my bookmarks to another machine, it gets them all, but it randomly re-arranges the order of the folders. Sigh...