I was using Opera's VPN to get round geoblocks (the odd youtube video or text at the Hathi trust that were blocked to non-US IP addresses and sites like libgen with access blocked by court order in the UK etc).
However it started getting a bit flaky back in the late autumn. First downloads started regularly failing with 'network interruption' messages. Posts at the Opera forum suggest this was a fairly common issue but there's been no fix as yet. And then in December they started unrolling Opera 49 with an 'improved' VPN. This involved dropping Surfeasy who had been providing the VPN service and moving it in-house.
Opera 49 updated with renewed VPN - Opera Desktop - Opera Blog post Dec 12th
This was accompanied with a change from providing VPN service on a specific country basis to a region basis (you can now only change to one of a number of global regions). Unfortunately this regularly fails at convincing geoblocked sites that you are in the right specific country as far as they are concerned. And downloads still failed.
Anyhow I switched off the Opera VPN and installed the Browsec add-on. All is good again, for the moment anyway.
(Incidentally I haven't tried it recently but before they added the VPN function you used to be able to circumvent geoblocks using the Opera Turbo function which serves cached versions of pages for people on slow connections).