Mark (the owner) is the man! We had GCS come and clean our carpets in November of 2014. By mid December we were noticing horrible looking stains and spots in the entry to all rooms. I called GCS and told them about this. Without hesitation Mark came and re-treated all of those areas. Come to find out it was from the company that had previously cleaned my carpets, not going to mention who that was (Chem Dry). We will most definitely be using GCS in the future due to this incredible display of customer service and satisfaction, oh, and the fact that our carpets look awesome. Thanks GCS and thanks Mark!