I agree that it is a personal decision.
I like my Go!, but much prefer using my June Tailor Shape Cut mat for cutting strips. What I do like the Go! for are unusual shapes that would be hard to cut with a rotary cutter -- e.g., circles, hexagons, tumblers, and especially triangles. The triangles are great because all the "dog ears" are cut off, making them easy to match up accurately with each other and with squares/rectangles.