I purchased this floor cleaner after reading the good reviews. My cottage has a stone flagged floor in the kitchen/dining room and, over time engrained dirt built up. I've tried scrubbing it with bleach and hot soapy water but it never looks any different. I ordered this (was impressed with the swift delivery btw) and decided to try it out just on one to see if it lived up to it's name. Oh my days! I couldn't believe how relatively effortless it was. I could literally see the dirt lifting! Needless to say that the water I used for rinsing resembled mud but, as you can clearly see, it did the job. Can't wait until the whole lot is done. Thank you.