I needed to organize a bunch of tools and other miscellaneous items in a closet. I tried printing a few Gridfinity items, but quickly realized that it wasn't worth the time, effort and filament + electricity costs. I ended up going to the dollar store and buying a bunch of plastic containers and some labels, and managed to get everything organized in an hour and for under $10.
I think Gridfinity is more geared toward people looking for a hobby than a practical storage solution. Which it totally fine - people are definitely creating some cool stuff with Gridfinity - but probably good to decide up front which group you fall into.