I have both the Pro 100 and on backorder is my Pro 200. They rock because they have smarter programming in them for different types of cycles. Also they have idiot lights and that works for me bigtime!!!
Yes, you can build your own for about 1/4 the cost, but it isn't the same. Aerogarden is made to grow plants and for a plant of any sort newbie, it really works!
Cheers!!
PS The new Pro 200 has three lights and the hood expands to 24". Also it has some new lighting cycles. I use Hydroshield to prevent root rot, Fox Farm neuts and two air stones, (one on each side) to keep the water for of air.
What does everyone else do?