I lloovvee this machine and it is really getting a workout, let me tell you! I have cleaned all of my tile grout and I am working my way through my daughter's grout too. There are a couple of things to note but they aren't really inhibitive. One is there is no water line indicator so I am constantly overflowing it and water pours out of the little overflow hole, and it takes a when to heat up but if you turn it on and then go and do something else, you can come back to it later and smoetimes I just turn it on and leave it on so it's ready for use when I need it.