I have not had any problems and I have used these 3 times.

Product was delivered and appropriately packaged in a timely manner. Overall I’m satisfied with the purchase.

I use these all the time and they always come tru. Quick colonizing

good quality. Just had 1 out of many that had sum Grey stuff in it Soni tossed it. hoping they will make it rite.

Has done as well as they said. So far so good. Almost ready to be put in fruiting chamber. There has been no contamination whatsoever and I was worried that somehow i would end up contaminating the jar myself and so far the jar is almost completely colonized with no other molds or anything.