Looks fine so far. Oddly it would not complete the download in IE7 after three tries. It just hung at the 1 second to go and verifying. It came down perfectly in Google Chrome.
The only tweak I had was to update my Windows Live sign in plug in and all was well. This site (PCA) was flaky in 8 so I am running it in Compatibility Mode which is easily done from an icon to the right of the address bar.
I cannot find any UK based sites with Web slices but I have one running from EBay.com to check them out. It's necessary to get the add ons to make some of the features work. So far 8 seems faster than 7.