A very nice one-handed aeration device, if a little less effective than the Vinturi.

On the multiple plus side: easy to take apart and clean, very easy one-handed operation, sleek, modern black and silver design, cool to watch work, can't "flood" the glass -- you can tip it as much as you like.
On the minus side: it can leak, so make sure you have both halves tightened. Even then there will be some leaks, and it's an all plastic device, which for some wine drinkers is just wrong.

We first used this at a wine bar with a wine we ordered (Cline 5 Reds, as it turns out.) We actually tried the "taste" test on the back of the box and it really did make the wine better. My estimate: at least 2 grades. And one pouring note: the most effective way to use this device is to tip the bottle (with the device installed of course) beyond horizontal until the device is in a vertical position over the glass. This will yield the maximum aeration...