The start button exists, it's just some big fancy touch enable interface.
Personally, I am really happy with it. It was a punt, I thought I was going to hate it, but ended up enjoying it. I think it's one of those things that's like Marmite, you either love it or hate.
I hate Marmite, but I actually love Windows 8. I find myself navigating across it very quickly and easily, it's incredibly responsive, starts very quickly and I get along with the new interface just fine and in some ways, I get along with it better than the old interface.
Of course, I wouldn't say it's without fault. But there is a reason I've installed it on 3 PCs now.