I think there's a bit of confusion about these... the one I went to was through exit 1 at Ari Station, then past the BMW dealership through a small street on the right hand side that led to a little area with several shops. When I arrived on a Tuesday around 6, there were two stalls open, one selling delicious tofu and mockmeat curry and selling seaweed and other snacks, and another nearby with the sign "Vegetarians" about it - that one was pretty much dry by the time I got there. It didn't resemble the pic here, which may be because I just didn't see the main space.
Anyhow, it was delicious, that special homegrown Thai veg style you can also find in Arawy (Aroi), but this one's a bit more convenient with the Skytrain. Definitely worth seeking out, I'll be back to figure out exactly what's what!