Had a quite good experience with nostr:npub1tand04svfdhrt7lhg6687fh0y2xvxfpr9nkkj27rqfrxfpeklldsp48sax during my weekend in Nairobi (great marathon also!)! Only glitch I had was when at the hotel they asked me for my phone number to generate an invoice in the POS terminal (?). Had to use the card at that moment but on all the other instances it worked perfectly even against the will of some vendors (hello Safaricom lady!)