Enjoy your GO! I have one as well and totally enjoy it! I did also have the problem with the 5" die and had to call and find the fix for it.....it's all in the grain of fabric and states on the papers how to do it....I just didn't read them.
I have several of the dies and tried a manila folder rack for storage of them and the mats, that didn't work too well as they kept falling through. I ended up putting them into a hanging file container (lid removed) as they all fit in there nicely! I would end up having to have more than one rack eventually. Also, if you go to youtube, there are a ton of videos for shortcuts and how to double cut on them.