Had 24hrs to get Covid tested before leaving Amsterdam. Daughter found Klook and booked Covid tests via the app at a particular testing site. When we arrived they explained the Klook test vouchers were no good - missing info. They suggested we approach Klook to 'cancel' vouchers and get refunds - we then oaid out of pocket. We showed Klook our invoice from test center - explained situation and requested refund. Took 1 week to het back to us after wemd traveled home. No refund. Bo explanation. Clearly co that on w they have your money - could care less about what happens to you next - awful experience and still missing $200 for svcs not delivered. No explanation, did not even bother to contact test site. No one should ise this app unless you want high probability of something going wrong and temhen learnkng they could care less. Love to put their cust svcs people in our shoes and then see how unafair and costly it feels to them.