Only able to harvest about 1/4 of the tray the last three attempts. Wrote to the company, and they only wanted to outline all the things I was doing wrong, without ever asking me if any of it was true. Very condescending, and not interested in listening to my concerns. They offered to replace just one of the three "quilts." I told them not to bother, as I'm done wasting my money. And one more thing, I grew about 5-6 others successfully, so at this point, I fully understood how to do it. I can also read and follow directions with the best of them.