The worst. I lost €260 because of Kiwi and have had 2 months of stressful, annoying customer service contact during my travels leading to nothing but disappointment. Kiwi accepted a last-minute flight change on my behalf which I did not want, however I fixed this by rescheduling myself on the airport and was assured a refund by the airline involved. However, kiwis details (creditcard number + email) were in their system instead of my own. This couldn't be adjusted since the refund would have to be to the same account. Since I wouldn't receive any direct communication because of this, the lady at the airlinedesk adviced me to take a picture as proof of the refund. Kiwi only refunded the costs for the luggage but never for the €260 flight. They blame the airline and say that my picture is invalid proof. So definitely won't ever book here again.