I got interested in aerators after experiencing a blind taste test with the Vinturi at a winery. I couldn't really see that the Vinturi was adding a lot of surface air to the wine, but the taste difference was striking. I Googled around a lot and found that people didn't like the Vinturi because it requires two hands and careful pouring (causing spills), and it's not really easy to clean.
I found a comparative review at an online wine site, where they tested I think five different aerators. They judged that the Soiree produces the best tasting wine, and gave the Vinturi a very close second. The others tested all came in a lot lower than these two.
I picked the Soiree because I like the bottle-top functioning, and I think the large-surface-area technology is better than what the Vinturi has. It's also very easy to rinse out after use. In using the Soiree you turn the bottle vertical, so the wine flows out in a thin sheet all over the insides of the glass sphere, exposing it to lots of air.
The only thing I don't like about the Soiree is that a tablespoon or so of aerated wine flows back into the bottle after each pour. Fine if you're going to drink the bottle in one setting, but maybe not so good if you're going to put half the bottle in the fridge for tomorrow. Maybe I'm being too neurotic about that.