Good for adults, who build it. I don't think you get the idea behind doing most projects like this. It isn't to have some amazingly practical tool or to make money but to learn, explore, and prove you can do it yourself. This is the same type of comments people posted when the article about the non-von1 was on here. Give credit to the DIYers for doing these amazing things themselves with limited budgets.
I have to agree, its kinda a sneaky thing to do. Should mod parent up