They had good hourly rates, but I Can't really recommend them. They diagnosed my navigator with a chk engine light and a mis as cruise speded to be O2 sensors. Replacing them caused the chk engine light to go out but not the mis at cruise speed. On a later visit I had a very poor idle and an increasing mis at cruise speed. They diagnosed again with a vacuum leak. I was assured that fixing this would cure both problems but it only fixed the idle. I had told tem I suspected the spark plugs. Later I had a different shop look at it, and they diagnosed it as the spark plugs plus one coil. They did the work, and the problem was fixed. I wish Airpark could have diagnosed this on the 1st try.