it's small, sturdy, and it outputs a decent signal. I've only tried DVI and VGA thus far, but it does what it's supposed to with each. The only way it could be better is if it did that with BOTH. It only outputs one or the other; you can't duplicate or extend your desktop with this as your only video source.
It's powered by the display port; no external power connection is required.
The adapter works well so far. I tested all of the ports upon receiving the adapter. So far, I have used the adapter once. It is a good value if it lasts.
the one they sent wont work at all... no signal at all on any of the connectors... try on different computers and seems to be broken... i just wasted my money...