You have to smile, when they plug "portable" in their add. You can't get more portable than a 6' x 4' cloth which I might suggest gives greater variability on terrain set up than any fixed board you could design.
If I were to fault the cloths, it would be that relentless green, which is why I prefer something like Terrain Mat to stage my own games on. However for a club game where we aim for fun by getting all the toys out and just enjoy playing, those green cloths are great.
Cheers
JJ