I use AirVPN 99% of the time for 2 years now, think they where 1 of the first who also accepted Bitcoin.

I wouldn't use them for so long as my main VPN and almost route all my internet traffic through it if I wasn't happy with their service and trusted them, they take privacy really serious and also promote the use of Bitcoin for their service. They give great support on their forum and have good guides there, just check the forum and you'll see.

The only problem I have and it's one which is actually not their fault but because of the fact they take privacy so serious also attracts people who do less noble things with their connection which makes the IPs blacklisted a lot and be prepared to fill in a lot of cloudflare captchas. Something I don't have or at least less with other VPNs, but it's a price I happily pay to be safe.