I had complained about UR performance in this forum, so it is only fair that I mention that, whatever they did, the performance in the new (beta) release of UR has improved very noticeably!

It is so good that I have returned to using it even as a repository for some Web Clippings, etc.
BTW: Stored Web Pages and Clippings can now be edited in UR - something many users have been asking for.