I have at least four of the rulers -- June Tailor Shape Cut, Shape Cut Plus, Shape Cut Pro, and the Stripology. The Shape Cut Plus is probably the most versatile for me and probably the most frequently used. Cost of the Plus is $30 on Amazon (not including shipping), so I think you got a great deal for $22.
I am in the minority, as I don't care for the Stripology ruler. I would use it if I didn't have the Shape Cut Pro, but I prefer the Shape Cut Pro if I need a big mat. I don't like the outer dimensions of the Stripology ruler as much as the Shape Cut Pro, and I also don't like the hardness of the Stripology mat or even its markings (which are visually confusing to me). I rarely use the large mats but, as someone else mentioned, they are useful if you have a lot of 2.5" strips of background to cut.
In terms of cutting, I have no trouble with the Shape Cut mats; my rotary cutter stays in the groove. I do try to be careful to hold my cutter straight up and down, but I try to pay attention to that with regular rulers also. I did have some slippage with the Shape Cut, similar to slippage I get with regular rulers, but I solved that by placing some Grip Strips underneath. I have tried many other grippers in the past (sandpaper dots, cut-to-measure plastic gripper liner, etc.) but the Grip Strips have worked by far the best for me. Here is a link to them on Amazon if you find you need them:
https://www.amazon.com/Guidelines4qu...dp/B009DF9DLA/
One package is enough for several rulers, as you don't need them on every edge and you can cut them to whatever length you want.