Please learn from our experience. Yes the 12" squares are nice, easy to put in, and cheap. Easy to install. and even look nice for awhile.
However after a short period of time, they will begin to lift, dirt will gather in the cracks, and if you install as per the directions, you may end up with 1-2" pieces on the ends, which carry a lot of weight and variation. which will cause them to rip up. as illustrated by the pics. with teh wife being anal about clean floors, it had to go. in the pics you should see the poor quality product, mentioned. i through in a final pic as well. (i need to clean my camera lense evidently (oops it was the computer screen - not camera), as the new floor sparkles) The new floor is in, may not be perfect, but much better than the old.
before - this was as clean as it would get
close up inside door
close up outside door