I was hesitant to use this co. Mixed reviews. Perhaps they had initial issues or were deluged with Groupon special offers, but I had no issues. Slight delay from the time I sent in until they actually confirmed receipt of my sample, but then results were processed and the report sent in promptly. I have been having severe stomach issues when eating out and all medical allergy, CT, Gastro tests had come back negative. Their tests showed food INTOLERANCE issues and I've been eliminating those specified to FINALLY better results. I am quite satisfied with the service I received, the informative report and considering some other tests with them. I did email them and received a reply within a couple hours. So I have no complaints, very satisfied.