The owner was very nice, knowledgeable and accommodatingOn my first appointment he did not have a unit-they were on order and 2 people were ahead of me-I dropped my car off the next evening and car was done the next dayHe stayed after hours to go through the paperwork with me and explain the details of using the unit-very informative and answered my questions. An employee of his then showed me how to test, what to be aware of and very knowledgeable as well. It took a few times for me to do it correctly but have it down now. Would and will recommend them to anyone I know on need of this device-it is a bit sensitive as to length of the blow but practice makes perfect.Will be calling to make my first payment either tonight or in the morningIt was a real pleasure working with his business, although small I got great service and with a smile-Thank You R&S AutoMaureen