So far, loving all the changes in POSH. And improved speed.  The locking desktop screensaver, out of the box. All the little tweaks that make performance more pleasurable.  I've always enjoyed the "gnomish" desktop experience.  Missed the disappearing left side bar for the first fifteen minutes, until I realized that I rarely use it, except for the Seamonkey icon, which is on my desktop now. Kudos.