Anyone used Tile Doctor to clean and seal a floor?

[JugglingChaotically]

Been burned badly by dodgy tradesmen recently so although they seem reputable and sounded good when they visited to quote - I am wary of using anyone without a now. recommendation
Has anyone used them?

Anyone ?

No idea about tile doctor but used grout pro very happily. I think it's similar & best applied as early as possible in tile's life, not 5 years down the line! (was very dusty...)

Thanks Gozo. Trying to do it sooner rather than later
Tile Doctor can come and do it for you but it's not cheap.
So keen to check them out.
Will look at grout pro too.