It's very coarse and very difficult to strike off smoothly which leaves quite a rough surface, which surely defeats the object of an epoxy if the dirt has somewhere to sit, it reminded me of bal wide joint when doing the walls, quite a task to keep it off the floor. As for the washing off, I washed it 4 times with their liquid in hot water and there's still a greasy residue that I can hopefully get off in the morning when it's set. The biggest issue is how long it takes to set, every wash just pulls a bit more out of the joint and smears the tile face, I used a new sponge for every wash and followed the instructions very carefully. And my final gripe is its 8 times the price of a cement based grout, now that's just outrageous.
