The Spot Clean Pro is so easy to use and does a better job than my large carpet cleaner.  Stairs were so much easier with this unit and believe me with 2 big Dobermans stairs can become a chore.  The water refill is easy to use and fill thanks to the flat bottom design.  I’d highly reccomend the professional cleaner that comes with it.  It was so much cleaner than Ive been able to get my stairs and the smell was lovely. Like walking on soft clouds as you ascend the stairs.