Have had one since Xmas so didn't buy it myself but I certainly would. We've planted twice since xmas, a mixture of things each time. One hint that I would have is don't try and mix so much, what I find is the fact that everything grows at different heights what winds up occuring is 2 or 3 things take over and the smaller things dont' grow.
I think with my next batch I'll just do 2 things.
Best sucess has been with basil, since I'll put basil in most everything it works out well