It works great. I really like the fact that it is built from common hardware and can be packed to a small size. However, I don't understand the purpose of front square holes. They look like they're intended for nuts but are too small. On the other hand, front bolts hold tightly even without nuts.
I've combined it with https://www.printables.com/model/251614-strong-arca-swiss-clamp so it is now Arca Swiss plate compatible. (edited)









