I have the AccuQuiltGo and so far have not used it much. But that is because I have been trying to finish up UFO's since I got it. But have the June Taylor shape cutter and used that for cutting the binding and squares. My June Taylor is only 12 inches by 12 inches - but works wonderful. I bought it at Wallmart - it was on clearance so thought why not. And it worked out to be a very important part of my tools.
As for the AccuQuiltGo - I do buy the dyes as I see them on sale and know that I will use them, like the various strips and some shapes like the hexagon and tumblers.