First off, I think this is a really cool idea. That the orb can spin on its own is a very striking feature, definitely making it an attractive piece of jewelery. Looking at it, and reading about it, one can't help but want to wear it themselves, and test it out.
The curve of the ring itself is lovely, especially how it arches up, rather than meeting like most rings do.
I suppose my main issue with this work is, technical aspects aside, the most intricate part is the bead in the middle, which was not made by the artist. However, as previously stated, the construction of the ring is very well done, and it is a really interesting piece of jewelry regardless.