When you find the ruler for you, you'll stay with that brand.
I had Omnigrid (after the seweasy shambles) for years, made all my mistakes on them, chipping the corners with my RC etc ... and then, last year was hankering to upgrade to Omnigrip, the one with the adhesive markings ... (because when I applied my sandpaper dots I naturally applied them to all the wrong places ie directly over the 2 1/2" square markings) ... when the wonderful
@Puzzler very generously gave me some gift vouchers for my birthday with the heavy hint ... 'they sell Ominigrip you know' ..
So Tah Dah!
I now have a new spanky set of Omnigrips ... (without the chipped corners and scratches cos my RC techniques are better now) ... Just the 12 1/2" sq to get and I'll be as happy as a Sandboy!
@StitchinTime ... Just shows ... different strokes for different folks !