What I liked:
The touch screen works very well, with some inaccuracy, only seen on rare occasions when I have to click a link without zooming on the screen
Speed: it is usually very quick to switch from one application to another.
Live Wallpaper: very impressive (although I suspect that eats the battery).
"Modem" feature: In 30 seconds my laptop was connected to the Internet using the phone's 3G network, and without any cable!
Camera: candy comes with all modern cameras have. I liked the Panorama.
Screen: new colors and crystal, can be used even in direct sunlight.
Unlock pattern: It seems silly, but I liked it!
Power profile: it shows how much the battery is consumed per application, and then you can have the opportunity to improve battery life. In my case the screen is largely the most of the battery, so there's not much I can do, except not in use.
What worked
Web Browser. He could do all the pages I've visited, is quick and easy to use.
Multi-screen. It's good to have more than one screen. I know I should be very useful, I do not know why.
Swype: Surprisingly easy to use, just needs some improvements in word prediction.
Maps and traffic information.
What could be improved
Software Store definitely needs to be improved, for example: I want the ability to sort search results, I want a more detailed search, and, of course, more software available. In addition, some type of security review / karma would be useful. Some type of accreditation of providers may also help. I'm not saying I want the Apple dictatorial system, but I think some basic security / control / verification would be good.
Wi-Fi: It works well most of the time, but sometimes it automatically connects and then I have to go to the list of networks and click the "Connect" button.
3G: I took some time to understand how to configure the network. Still not 100% sure I could do it again if I lost the configuration ...
Applications: too many applications, badly organized. I'd like a way to group them logically or within a folder, especially those rarely used (it may be that there is a way, and only I have to learn to use it).
Language: The default language is Korean or Chinese (I am ignorant and do not know the difference between the ideographs). It should not be in English!
Language Support: definitely need to be supported by Portuguese.
Voice Recognition (Vlingo): That's a joke in bad taste. SECTOR I say, understand sex shop. Hmmm, is reading my mind? :)
Battery: It lasts for one day on a good day. Much less if you are a heavy user.
Access Storage Device: That's hard! I spent a whole day trying to find a way to use the media device in Linux ... And then I realized the problem: the SD card to be removed first! (Settings / SD / SD Card Off). Once I did that worked.
GPS: The initial block takes much longer than Nokia N82.
Using 3G I do not know how much data is being transmitted / received, we will see next phone bill. That "transfer fund," "feature" is my concern. You may also have some support / network selection type, always use the network, even when the network is EDGE available. OK, maybe it already has this control and I do not know where.
Side buttons: I'm always accidentally pressing buttons.
Flaws: He hanged himself a few times. One time I had to remove the battery to return. Sad.