Yes, we have tested the Surfshark money-back guarantee. We signed up for a Surfshark subscription and, before the 30 days were up, contacted Surfshark’s support to request a full refund. The request was honored, and the full refund was received within a few business days.
Note that when requesting a refund, Surfshark may ask you why you’re canceling in an effort to see if they can resolve your issue (as well as to continue to improve their service). It’s also important to know Surfshark is unable to refund purchases made via iTunes, App Store, or Amazon (you’d need to refer to their specific refund policies).