I have used Sungloss Marble Co. on a couple of occasions. The last time they came out, it was to clean my limestone floor, and also to clean the caulking in the shower. They showed up on time, and were very friendly people. I was impressed by the way they took their time to devote extra attention to those areas which needed the most cleaning. They would stay at it, and work that area until it was clean. I think this was very conscientious and diligent of them.