I've used them for years. They're likely the most private VPN, but I still can't recommend them. Their IPs are constantly blocked, and with few servers, switching doesn't help (this was already an issue long before I was a customer). Plus, their macOS app has tons of issues.
Huh, I've been pretty happy with them. I live in a country where IPs are often blocked entirely by US and European websites (presumably due to hacking issues and lack of government action). So my major use is being able to access websites.
It's true that servers are flagged, but every VPN has that issue. Usually switching to a new server resolves it and I've noticed some servers aren't use much and are very fast and not flagged by many websites.
What I like about Mullvad is not only the commitment to privacy, but also the VPN speeds. I get 300-500MB/s pretty regularly. Some servers get congested during peak times, but switching to another I'll usually find a fast one in a desirable country very quickly.
