I have to admit I have been looking at steam mops for months.  I have a Shark vaccuum which I love that I bought about 5 years ago so I took a chance with this steam mop.
I am happy to report I am very pleased with how easy and effective this little mop it.  Loaded with steam and I used it on my kitchen white tile and grout, my master bath white tile and grout and other bathrooms in my house so I have had good trials and it is great.
Also, for the grout, it does clean it but just to be a little more deep cleaning, I pre-treat the grout with natural homemade all purpose cleaner and gave it a little more of a bump.
You can get a recipe on line if you want but it's not necessary.  I look forward to using this mop every time I use it.  I use it once a week on all my tile floors.Very easy to put together and use.  One tank of water accommodated all my tile floors in my house and I would say I have approx. 300 square feet of time or more.