I bought a few - not for angles, etc. - but non-slip accuracy! I've always had to add the sandpaper and other dots.
The Truecut rulers DO keep the rotary cutter from waving all over, but I had to add dots to those. I think the table might be a tad high - but it's either back or the ruler, and I choose back.
So far, the Quilters Slide lock is the only thing that works.