It isn’t bad, but it needs some work. Some things off the top of my head would be.
1. a W7 start button on the taskbar or a metro button equivalent.
2. an option to allow an unsigned driver when prompted.
3. A much more customizable taskbar.
4. Different Email accounts acessable via the metro ui, not just a MS email account
Other than that when the weather app started up I thought it was very cool.
It’l get to where it’s useable, but nothing works as well as W7 yet.