I use both Olfa frosted and Quilters Select regularly. I love them both because they are very easy to read for me. My favorite is Olfa frosted. The big difference is that when on fabric, the Quilter's select "holds" to the fabric. This is good and bad. When I'm trying to adjust the Quilter's select, I can't just scoot it over a few inches to cut another piece. I need to pick it up and move it.
I saw Alex Anderson demonstrate her Quilters Select rulers and cutting mat. The mat is smooth and the rulers stick to the fabric, so you can turn your fabric easily. Example would be when you square up a block and your ruler (4 1/2") is the correct size of the block you need.