It makes a great birthday present, and a great way to teach kids about how gardening works if you don't happen to have a yard, and the importance of responsibly maintaining the nutrient tablets and water on a schedule. Plus, if you buy the herb kit, it's a great way to get them to grow you fresh herbs for free :)
I got an email today from Aerogarden saying that this is by far their best selling Aerogarden, and they have a hard time keeping it in stock, so hurry and get yours while you can!