No problems with the distro!

No reconoce algunos dispositivos USB

on boot: bios screen shows, then goes blank and display does not return until after ubuntu has booted. By contrast, 10.4 installed easily with no problems at all. I hate to see it go as it ran well with little trouble. Canonical might have left the desktop distro alone and made a special version for tablets and their unique requirements. Personally I do not care for the unity desktop at all,

I think this is a great release from Ubuntu. Like Unity or not, if you let it be and just use it, it's not bad. Purists may laugh at that notion, and debian feels snappier when I use it, but that doesn't mean this is a complete miss.
Some things that stand out that I like:
-indexed file searching from the start menu! It's fast and reliable as it should be..
-all the actions/programs seem very refined and uniform(visually), which is actually a big step forward for *nix distros if you ask me
-ease of use, my wife uses fairly painlessly and seems to like it
-bleeding edge of linux as always from debian/ubuntu
-personally unity has grown on me, so I'll say it's a plus here
- better support for 32 bit software on a 64 bit system

that I don't like:
-Most fall into the category of problems with linux as a whole
-in favor of 32 bit binaries, they seem to be shying away from the other platforms that debian has infamously been ported to(read not enough time/resources).
-there is some serious lag for full industry standard hardware support such as usb 3.0, mtpfs (newer android phones use this protocol) and others. USB 3.0 tranfer speeds using Ubuntu can be freakishly slow, when compared to windows and even it's debian counterpart.
-the lack of choice that Ubuntu has. They obfuscate the visual choices and even the security choices more with each new release (see: Unitiy, sudo). This is good and bad in reality, good for end user ease of use, bad for choice.

Over all I would recommened this to a person that wants to move to linux, or just try it. It is the easiest and best all around distro to date. Linux purists probably will stay away.