I have tried it Wolfie2 and it seemed about the same speed as Firefox but a lot quicker than IE7. I tried my hardest to make it hang/crash but it was very resilient because of the way it isolates each website when you open more than one. It has got this brilliant 'incognito mode' which avoids saving any of you history or personal info onto the computer, which is perfect for Internet cafes or work. As with any beta/test version, I would hold fire migrating over to it until it has been fully tried and tested. Apparently a lot of problems have been fixed for the next release. Try it and let me know what you think.
Aunty