I have clicked on the link. It is just a site trying to sell a novel little gadget to raise herbs in your window. Cute, but in my opinion, way overpriced and too small to be useful other than an ornament.
It would be a pretty decoration, but the herbs grown in the pots wouldn't get big enough to harvest very much very often. If you want a window garden, just put a shelf on a well lit window sill and put some useful plants in pots on the shelf. Ideally, oregano, thyme, chives, basil, dill and other seasoning herbs would be very suitable.
This way you can grow more, without consuming much space, for a fraction of the cost.