I bought an Alto System two weeks ago because I do a lot of strip quilting and without fail the ruler would slip no matter what I did. Last night I finished the fourth strip pieced quilt top (40x52) using only the Alto.....every cut was consistent and so easy. The trick to getting the fabric to line up is to fold the 44" wide fabric twice (22" for the first fold and then fold again to 11" wide). Iron well and have a sharp blade in your rotary cutter. I have the Go and don't use it because there seems to be so much wasted fabric. Now that I know my accuracy is so much better, the Alto will be coming on retreats. Luckily I splurged and got the carrying case.