Got the pearl oyster grow kit from them. The instructions were clear and easy to follow. I was able to get a great harvest of mushrooms around the expected time of 10 days. I'm looking forward to attempting to grow a second crop with this kit.
This would be a great gift for older kids who are interested in the world of natural sciences.
My only complaint is that once the mushrooms start to get growing, the box tends to lean forward and you could risk damaging your crop. I would like to see a redesigned box to support the weight of the crop.