I absolutely love mine!!! I have the 1/2 inch spaced ruler, the 1/8's ruler, and the one for HST's and QST's. Love them all and plan to purchase the 1/4 inch spaced ruler soon. I had problems with not holding my cutter at the right angle and with waivering with the cutter or moving the ruler, but not since I got these wonderful rulers...very accurate cutting now.
My 6 x 24 rulers are now mostly just used for folding fabric. LOL!