So I called OneGuard Home Warranty to have them send a contractor to conduct an A/C tune up on my house. Overall I am happy with NVM's services. Let me start off by saying I was a bit irritated at first because they scheduled an A/C tune up in the early morning (when temps are cool) and thus could not accurately check the refrigerant level in my A/C unit. The tech explained to me that the unit refrigerant levels could not be checked precisely because it was not Warm enough outside. So I called the Home Warranty company back and told them I paid for 100% service, I expect the services to be 100% completed. So I had to take an extra 4 hours off of work to accommodate another tech to come out to my house and complete the service. Julian was the second tech to arrive and finish up the services. He found one of my A/C units to be a little low on refrigerant so he added some. He also taught me some things about my A/C unit and was very insightful and helpful on this. So I give them 4 stars for completing the work under one work order (I didn't have to pay extra for the second visit--not that I should have) and also for Julian being super friendly, informative and insightful. If they would have done this all 100% on the first visit, I'd have given them 5 stars. Not sure why they schedule A/C tune ups in February bright and early in the Morning if they know going-in that they cannot get accurate readings on refrigerant level in cool morning temps.