So, this post will not be particularly edifying but I just wanted to report that Lion is running very well on my quad-core. Boot times are a bit slower then Snow Leopard the overall performance seems to be the same as Snow leopard. The UI changes are nice and overall and I do like the upgrade. It is not drastically different then Snow Leopard but the additional features are useful and refined. I really like the new mail. Launchpad is convenient as well. So far, all of my software is working as it should. The major ones includes: FCP 7 Office 2011 iLife & iWork CS5 Master Collection Cyberduck Vmware Fusion The upgrade was easy and painless. On my Macbook Pro it took about 35 min to install. Anyway, if you have any questions I am glad to answer to my abilities.