They charged me for a round-trip when I was trying to book a one-way. In fact, discovered through the airline directly that I had booked a round-trip flight, though Opodo still only showed me having a one-way ticket. I now have a return flight I cannot take or cancel or alter in any way. Trying to navigate their website or mobile app is ridiculously difficult; no access to live agents despite having a "Prime Membership" and cancelling that proved to be difficult bordering impossible as well. (Though I think/hope I've finally succeeded; I've cancelled the credit card that was associated with the account just to be sure they can't charge me for anything else!) Avoid Opodo like the plague.