Yes, I have downloaded the Windows 8 Developers Preview, and installed it, as well.
I used Oracle's VirtualBox (www.virtualbox.org) to run it in a VM.

My first impression during installation was being offended at the push to link it to my MS account... the very last choice was the option to create a standard user name.

During installation, I noticed the crude 'slide switches'... and then realized that this new UI for an old bloated code base, was indeed, rushed out, so that MSFT may grab as much of the tablet and smart phone business as possible.

How hard could it be, MSFT? To finally get off your a$$ and have a sound back-end which would be interfaced by numerous skins?
Users dont care about the code, other than it works dependably and efficiently.
What they care about is the interface.

These are my suggestions:

1) Fix the bloated code base that Windows has become. i.e., quit adding to it and build a robust platform.
2) Design UI's that everyone can use. i.e., use 'skins' that can make users comfortable with change (because it still looks familiar and they don't have to learn a new way to do things.)

Take the 'Ribbon" interface that was forced down the business worlds throat, beginning with Office 2007. It has cost the companies that use(d) Office, quite a bit of money in lost productivity and retraining. This could all have been avoided by letting users choose the UI they wanted... "Click here to use Office 2003 interface".

When they came out with Win7, most people thought it was too soon. Now Win8 is coming in so fast, it smells like greed. I already know the majority of the business world is pretty tired of the 'push tactics' used by MSFT. They (MSFT) are falling over themselves to get the latest 'new' thing out to the masses.

Remember when we had a new model (major change) in automobiles about every four years? Well that didn't make them as much money, so now we have a new model every year!
Thinking about buying a cell phone? Hesitant to sign up for a two-year contract,
when you know that your phone will be outdated (or will be made to feel that it is) by next week?
Well don't worry, that hesitant feeling is your common sense, letting you know something is wrong.

As an aside, this is a post to my Facebook friends, who had an e-fit, after yesterdays latest UI change.
(Which, by the way, we will probably see even more (changes), because of the Google+ rollout.)

"The main thing to remember is to bitch to the correct people. Bitching to your friends or the world at large isn't helping matters. Bitch to the developers... they are the ones who are making the changes, not your friends.

The world changes so quickly these days, and if you ARE pouring 100% of your energy into changing it for the good (probably with he use of a computer and its respective UI's), having to accept change in your primary tool, so often, just brings more frustration.

Can you imagine a carpenter, who is trying to build a house, having to change the way he interfaces with his hammer or saw, every week or so?
He would most likely give up, because true productivity comes from being familiar with the interface to the point it becomes second nature."

Same goes for MSFT.