Pettinato Tile

We had this company out to redo the grout in our shower stall because it was always showing dark spots and this was going to be the fix the idea sounded good using this special grout mixed with epoxy would prevent the dark spots from returning so we were told. The cost was very high but it would be worth it and still cheaper than redoing the entire shower stall. Well after six months the dark spots are back and now we are being told by this company there is nothing that can be done to remedy this. So to make a long story short I would not recommend this company to anyone for anything!!!