Disclaimer number 1: this is my first 1k EUR pen (yes, it's sold for under 1k, but it is nominally a 1k+ class).
Disclaimer number 2: i have a mild pseudo-"OCD" and random small details tend to bother me disproportionately.
With that out of the way, i absolutely LOVE this Pineider and no, this isn't the "honeymoon period" speaking. It writes perfectly, with absolutely 0 pressure, every time. It is not a flex nib, but it has a very pleasant give to it. I've purposefully left it capped, nib up, for a week, and it started writing the moment the nib touched the paper - i know some people are wary of the magnetic cap thinking it will not give a good seal, but it does.
The clip is perfect, the filling mechanism is fun to play with and look at, and i just love the overall look of it (but then, i do have a bias for demonstrators and a more "mechanical", "techy" look). Topping that off is the fact that everything on it is either threaded or press fit, meaning you can inspect, fix, or clean pretty much anything (if you're willing to void the warranty, of course) and it makes it a perfect fit for my affinities and likes.
The only flaws i'd mention: the machining is not *completely perfect* everywhere (there are some slightly sharp corners and the design could do with some fillets and chamfers); the patterning on the section band is just a slight bit cheesy looking and obscures the lettering; and finally, it's an absolute fingerprint magnet (if that bothers you).
I took a bit of a gamble on my first truly expensive pen, and i really do not regret it at all.