Over all, I'm VERY impressed with the software. With B2, it seemed very stable; however, I was unable to access a SMB share on my host machine (a mac mini, dual core). With B3, I was able to happily access the share with no problems! I noticed two major problems... - My machine hung during the upgrade. It appears to have made it to the "running installation script" phase, then my iTunes froze and mouse refused to move. After a few minutes I had to power cycle the box. - Once I had the box up and running again, I moved my VM to an external HD to improve performance. While the VM was running, my host Mac suddenly rebooted. No black-screen-of-death. Not sure if this was related to the upgrade or my moving it to the external drive. Thanks for any advice, look forward to the final version of the product! Norman