I just turned mine on 3 weeks ago and it works well. I think it is a money pit though as you have to buy the nutrients and special light bulbs from them. I have been thinking about doing hydroponic in the garage for some time now.
Aerogarden works but mine isn't big enough for the herbs to smell just yet. My chives aren't sprouting though.
Rahim makes a very good point, they are the suppliers for everything - which should make you wary right off the bat. I can't rate the product because I'm lucky enough to have a small herb garden right outside.