I use it for work and am thoroughly impressed by how easy it is to learn and quickly churn out a custom designed tshirt, bag, stickers, etc. When I reached out to the company about a license for hackerspaces, they eagerly provided their top product.
It supports a ton of filetypes like eps, dxf, svg, gif, png, pdf, jpg, tiff, ps, ai so using the files you already have is straightforward.
As much as I love FOSS like Inkscape, @tymeart and I spent a ton of time troubleshooting the InkCut 2.0 plugin on Threed using the vinyl cutter wiki page and found it to behave unexpectedly and inconsistently, if at all.
A significant aspect of a hackerspace is that it has working tools and equipment, so it’s important to me that we support what we have by ensuring it works. I didn’t even know we had a vinyl cutter until recently because it’d been tucked away unused for so long.