I burnt myself once when I didn't do enough research and bought whatever was first in the Google search results.
Turned out to be a scam with legal address in farm in UK. Collar came but it was extremely poor quality, didn't match pics on the website, app was crap, GPS was not really working (it felt that it is tracking my phone's GPS that usually is off).
I'm not sure about engineers outside US. I have noticed their never-ending job ads in local market, e.g. senior software engineer position for rate that rather lower mid-level devs get here.
Maybe pre-pandemic this was appealing for those who wanted remote position, but now there are plenty of other remote friendly opportunities.
Here are many negative experiences with Nextcloud at the top of the comments, so I'll share my 2 cents - I started using Nextcloud when it was ownCloud and generally haven't got any issues running a small instance.
If my memory serves me well, then at the beginning updates caused a lot of issues, but for past couple of years I'm pretty confident when doing updates. I update only via web UI when new version becomes available for my instance. Currently running v19 though v20 has been released 2 months ago. That way I believe I avoid some of the bugs when major version is released :).
Some negatives aspects that I have encountered, but don't see as a big deal -
newer Nextcloud versions require newer PHP versions that are not provided by Ubuntu LTS, that means, that I'm no really benefiting from LTS and I have to upgrade the distribution if I want latest Nextcloud (don't want to upgrade PHP separately).
and couldn't get Talk working reliably, whatever I'm missing, it feels that documentation could have been better.
Turned out to be a scam with legal address in farm in UK. Collar came but it was extremely poor quality, didn't match pics on the website, app was crap, GPS was not really working (it felt that it is tracking my phone's GPS that usually is off).
Can't get to trying another product.