Very interesting discussion comparing these 2 brands. I am still using my OmniGrid rulers I bought 20+ years ago. My 6x 12 has a hole in the corner at the quarter inch mark that Alex Anderson drilled during a class I took from her in the 1990s. I have noticed some wear in the corners, so may need to start replacing the 2 I use the most: 6 x 12 and 15 x 15.