I needed a smog certificate to renew my auto registration. Water Star did my first one two years ago. But, being on a tight budget, I called around to see who had the best price and Water Star was the best I found. The appointment was easy to schedule and my car was taken care of promptly on my arrival and they were done in thirty minutes. I appreciated that they also did a general safety check on my car. I also appreciate knowing that Water Star is so environmentally conscience.