Always been an early adopter. Loaded this on all my PC's (3) and have had nothing but issues. The new interface and changes are ok and cool. It just keeps locking up on me. Safari is absolutely horrible.... constantly locking up and I have to force quit. The whole system has a delayed reaction to the touch pad results and it is hit and miss as to whether or not it will work. iPhoto - slow as ever iTunes - takes forever to launch Safari - I changed over from jitouch on firefox with a 3finger swipe to go back and forth to the (new) Safari pad touch and it is a joke. Any program I launch takes forever to start up. I am all for new interface and innovation... this is disappointing. Suppose to be an upgrade?? sheesh. Since I loaded this system on launch day I have to force power off my system more times than I have ever had to in ALL the past years?? What a mess this is turning out to be. To think the whole last keynote by apple was to talk about software innovation and that this was the year. I hope IOS 5 works a lot more smooth than this.