The good, according to TNW Apple:
The new Skype loads faster. Also searching for contacts is easier on the new Skype, and its practically instantaneous. My favorite feature is Skypeâ€™s integration with the Mac address book. I can only hope that a new Skype app for iPhone will have this feature too.
Unfortunately a simplified Skype means you can only see one chat conversation at a time. … The UI takes some getting used to, and the entire size of the new Skype is annoying.
I’m not sure if I want to try this beta. I like my apps to be simple and compact. The Skype 5.0 Beta for Mac OS X seems to be less-than-compact.