This looks nice and can hold various nibs, but there are a few things that can be better.
Firstly the price. Even I think it's made of metal and it has weight to it which is well worth it, it's still 3 times the price than other plastic/wood holders that provide more nibs along with them.
And the CAP, the cap does not fit! It is a tiny plastic barrel that can barely stay on it. I think it's meant to be thrown away as it seems to be only used to protect the nib during transportation. It's quite long so I don't think anyone would carry this around outside.
Also the nib is a bit hard to take out and exchange. I used tape to get the nib out and I don't recommend anyone using fingers to take it out. The 4 inner metal clips need some tweaking before getting a smaller nib in there.
Overall it's a unique and high quality nib holder and I don't regret buying it, but it's definitely not for everyone.