Many years ago, I tried the June Taylor one, and did not like it at all. The plastic strips between cuts wobbled as I rolled the rotary cutter down the slots, causing incorrect cutting.
For the last 5 years or so, I've used the Stripology, put out by Creative Grids. Love it so much that I got rid of my space hog Accuquilt Go! as I rarely used it. I have the original, now called the XL. GE Designs (Gudrun Erla) has many YouTube videos on its use for shapes other than strips.