Regarding the finger:
I believe I got mine in 2017 or 2018. Within a week of buying it, had to go down a size and I'm glad I did.
I remember wearing it in my room and decided to do a hand shake and the ring went flying.
Yes the head of the nail does make a small indentation in my finger but I don't find it uncomfortable or painful. I usually don't notice or feel it tbh.
I wear rings often, so overtime, I've noticed my fingers becoming more narrow overtime and now my current JUC ring is too big during the winter and it needs to be stacked. It does fit better in the summer but I still stack it.
The only time I've felt discomfort is when I fell asleep with it on, stacked with another ring, and my fingers swelled up.
So I'll wear it during the day and take it off at night when I sleep. The indentation goes away quickly and doesn't leave a mark or callous.
Regarding getting caught on things:
Oh yea. The JUC ring will get caught on things. If you run your fingers through your hair often, it will probably get caught. I don't do that but I can see it happening.
I've gotten the ring snagged and caught on so many clothes, knits, etc. So now I'm just aware of it when I put on clothes or take clothes off. Or I just put on my ring after putting on my clothes.