Solid!
It seems to be very nicely made, sturdy and hefty for a small pen. The clip mechanism is very strong but releases the pen smoothly. I nearly sent this back at first the pen is ridiculously short but as it is thick it is just about possible to write with, you won’t be writing war and peace but it’s fine for small things. I think it would have been nice if the pen could have fitted into the lid to make the body longer for comfort or if it was a tiny bit longer and could take a fisher standard refill. It feels quite bulky for such a small pen with the lid on. But overall seems good quality. Look at the rec accessories pico pen if you are in the market for a small pen. That is slightly worse build quality but a longer pen for smaller package.