It's a fabulous product for what it is designed for:
-You are limited to a very discreet lockable grow, such as in the case of a med user with small children in the house
-You want to put your plants in someone ELSE'S apartment, lock the door, and let THEM take the fall if anything bad were to happen.
I've seen these things. They are cool as shit, and I'd love to have one to muck around with. But it's not suited to my style, and you can build yourself a nice tent much cheaper.
As with all things, it depends on your goals to determine whether it is worth $3500. Betcha you can find a used one on craigslist for a k...