We bought 15,000 mites for our orchard. The mites arrived 1 day later than expected. The label did not mention live insects, so they sat outside in 95 degree heat, not knowing what was inside. No instructions were included. I opened and gently stirred each jar and found found about 12 mites between the 3 jars with a high power magnifying glass. My crop adviser contacted Rincon and they were unable to correct this problem and figured they did not need to send and instructions. Low one star rating due to very poor customer service and inadequate product. Update (2 years later): I spoke with the owners. I think this may have been a one time screw-up. They seem to be sincere to improve their shipping communication and adhere to guarantee that all mites arrive alive. I suggest give them another try. upgraded to 4 star.