We were given one as a gift and it works wonders on a glass of wine. As you start to pour the bottle of wine through the aerator directly into your glass, you can actually hear the air being sucked through the vinturi vents and through the wine. You simply stop pouring once you have what you want in your glass. It is by far the easiest to use apparatus that I've seen in order to aerate your wine.
We have one as well. Takes ten seconds, very easy, and it does a good enough job that you can taste the difference. Not quite like letting wine decant in a carafe for a long time, but it's money for a quick decanting.
Keep it classy...your wine deserves better than this newfangled acrylic technological terror!
If I ever receive one as a gift...I'm definitely re-gifting it.
Vinturi recently launched a new aerator specifically designed for white wines...strictly white wines. C'mon man!