They have really improved since my last review. I never have trouble reaching them anymore. The techs are very polite and informative. There is never a delay with delivery. I still have to call once a year if I want someone to check out the oxygen concentrator. When I asked why it wasn't automatically scheduled I was told that Medicare has the yearly rule and since I was not on Medicare it is only when I request or think it's necessary. Before the merger it was yearly. Also, when I need new tubing, cannulas or whatever, I would call and they would send them. Payment was according to my insurance plan. It was only after getting on a support group for my respiratory illness did I learn there was a large variety of styles and materials for these accessories! I was referred to an online company which shows pictures and describes everything. I was able to get very comfortable rubber-like(not stiff) cannulas for home use and clear micro tubing (that is much less noticeable) for my mobile oxygen. Tubing is extremely cheap so I just purchase my tubing online from someone else. So I have to give them props on improving their business to the extent that they did.