Yes, I've had mine (in steel) since 2016 and I absolutely love it.
First, the things to be aware of, or cons, depending on your perspective. Probably because of the red LED, the time display is not always on. You have to activate it by pressing the button, which then illuminates for 5 seconds. It's not extremely bright, which makes legibility harder on bright sunny days. And I've always found adjusting the time to be annoying; my finger nails are never long enough to actively depress the adjustment button so I use a large needle.
But the pros are the looks, which are obviously subjective. I should (dis) qualify myself by admitting this is my first post here and I'm not sure I'm a watch nerd because I find the vast majority of watches most people are getting excited about deeply uninteresting from an aesthetic perspective. To give you an idea of my tastes, my collection includes a Farer Lander GMT, a JLC Master Control Date Sector, a Baltic Aquascaphe Blue Gilt and an incoming Lorca Model No. 1. I'd buy something from Oak & Oscar if I wasn't already saving up for a silver dial Omega Railmaster.
But within the strict context of my tastes, I think the Kosmonauta looks utterly magnificent. It's sleek and minimalist, with the red display giving me echos of 1970s sci-fi, Battlestar Galactica cylons or Tarkovsky. It wears very well on my small 16 cm wrist and I find it far more elegant than the Hamilton PSR, which I've also tried on and which I think is bulky and vulgar in comparison.
And not that it matters, but despite being by far the cheapest watch I own, it gets the most questions from random non-watch people in London. "What is that? A smart watch?" And when I activate it and the red display flashes on, their minds are blown...