I used Start8 which adds a fully-functional Win7 start menu to Win8. Absolute necessity, and makes it bearable, but I really don't think that's the point. A tiny proportion of people will bother (or be able) to install those fixes, and the rest of the world (including pretty much ALL businesses) have to do without, using the default install. If that's no good, then the OS is going to be horrible for them all to use, and it should be better than it is.
Metro is good, but the fact remains that the Win8 UI is inadequate. Without touch, it's hopeless, and whilst Start8 goes a long way to fixing that, it's still wrong. I use a Windows Phone, which is awesome (apart from the lack of apps). Metro works well on WP8, on a touch device, although it's still not perfect.
The individual elements of the UI are great, but the selection and application of them is not. Metro is a great touch interface - but the choice of a touch interface for both touch and non-touch computers, with no adequate consideration given to keyboard/mouse users, is a fatal flaw.