i have been using it for quite a while, it gives alot of free servers of different countries and works like a vpn when i need to access a banned site
take a look at this review of it from tech radar, I would suggest mulvad vpn or proton vpn rather than urban.
for simply accessing banned sites it’s better to use something like goodbyedpi since it doesn’t rely on any third party so your internet speed isn’t limited
But it you want a free VPN for that purpose, the best one is Protonvpn. You can compare the privacy policy to see the main advantages. Also proton is fast.
I personaly use Softether VPN. Its free and has tons of contries (usually Japan)