I've never used this type of service before so I don't really know how to compare them. The service was for my mom's house in Florida. She had health issues and air quality was a contributing factor. Indoor Air Quality Solutions, IAQS worked around my schedule. Lydia went out of her way to make sure the work was done when I was visiting from Virginia. They did what they said they were going to do and their report confirmed what I suspected. I was disappointed they didn't suggest remedies. They also didn't break down exactly what particulates were in the air, which I was interested to know. We talked about doing that but it would have cost more and involved more time. IAQS didn't recommend doing it. I had already spent four hundred fifty dollars for their report which I thought was pricey. I probably wouldn't pay for it again but other people might find it useful or necessary to have a written report. I recommend Indoor Air Quality Solutions, IAQS.