Here what a bad tile job looks like.

Notice the difference in color between the 5 tiles against the wall and the rest. Tile colors can vary slightly from box to box, these tiles should not have been used.

Notice how poor the cut around toilet drain is, although this is covered by the toilet it doesn't say much for their technique.

Look at the tile in the lower right corner, notice that the lines between the surrounding tiles are not straight and don't line up together.

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