Well, I am utterly happy as a clam. Cannot believe the progress I have made in last couple weeks. Really a huge tile job. Working with charcoal grout is really a PITA. But, I got a system down and figured out a couple tricks that make it really important when putting black grout on any porous non polished tile. Seal your tile first, then put your grout on. Will save you many hours of unnecessary grout work LOL I never had that issue because I never grouted with black grout. It is kind a different. This is just the first protective coat of sealer.