Personal taste is what really matters and even the experts, which I'm not have, a wide range of opinions on aeration and decanting. There are some people that prefer the pop and pour taste of wine where the young fruitiness is really noticeable, while others like it to smooth out. I have also read that when a wine is well aged, you don't want it to open up too much as it is ready to drink and can lose some of it's taste as it opens up. For me, I find that these aerators can help open up a younger inexpensive wine and make it more enjoyable when the wife asks me to open a bottle for dinner that is almost on the table.
