Try Window Key + X, it is great for me.
I thought so also, but so far I'm very satisfied. It is definitely a major improvement over Windows 7, at least for myself. The reviews are just ignorant people IMO who are turned off about the missing Start button. Old school people remember the shock we had with we switched from Windows 3.1. to 95, we were all lost...
A major improvement? Where exactly is it a major improvement for a typical, mouse & keyboard operated, desktop or notebook system? The start screen is just bad, bad, bad and nowhere as convenient and user friendly than the start menu, because it breaks workflow and lacks contextual binding in a typical multitasking environment. It takes you away from what you're currently doing in a completely unnecessary and avoidable manner. That's fine for a tablet or other simple consumer device, where the focus lies on the consumption of content rather than real productivity, but anywhere else, it's a major usability disaster.
Read what a real expert on usability says about it:
http://blog.laptopmag.com/usability-expert-windows-8-on-pcs-is-confusing-a-cognitive-burden and she spot-on with it.
And then the apps...Oh my... I'm fine with simplifying things, but this goes too far. The Outlook Express of the late 90's was a masterpiece compared to this sorry excuse for an email app we get with Win8
If this is what the mainstream wants, then I'm more than glad to be not part of this mainstream.
The touch UI isn't exactly bad, but trying to enforce it on a traditional system is just wrong. It *might* be true that desktop systems will lose importance for mainstream customers, but they're not going to vanish. There are still thousands of usage patterns for which a traditional and full-featured desktop computer system is the only way to go and this is not going to change soon (if ever). If MS fails to understand and accept this and continue to move away from the open platform, they're going to lose their core business.
The worst thing is that it is so incredibly easy to fix it. Just install classic shell and the start button is back. I really wonder why MS is trying to enforce this new UI for everybody. Even Apple, with all its control-freak mentality, has understood the problem and is providing two different operating systems for two fundamentally different device types.