Very good experience with Jeff Kitchen and the North Scottsdale location. I did a v02 max test with Jeff . Jeff was very professional from the minute I contacted him. He went over a lot with me on the phone initially. Then during the test and after he took a lot of time to educate me on what the test finds and why I was having the issues I was with my cycling. He was able to tell me what was wrong with me after 3 MD's were not able to do a thing for me. He gave me hope with just a bit of education. Thanks Jeff!!