The technician was knowledgeable, patient and took his time to do the job. I bought the condo only last year and this was my first time getting a AC tune up done of the 31 year old!! AC unit and I do notice the difference from last year. Would call them again! Not giving five stars just because they missed my appointment even after I confirmed a day before but could not answer phone at 7:30 am! the same day, but they did try to send the later that day.