I used them for booking because friends I was travelling with did. Will never use them again. I could not check in online. I kept getting automatic email requests to check in for a flight I did not book and that did not exit (!). The booking codes for the flights in my confirmation email were invalid. I could not write to Opodo as the only option is to use chat via Facebook and I do not want to give them access to my FB pages. I had to call Opodo UK number from abroad. They told me they cannot check me in and I had to check in in person at the airport. So I got quite worried and asked why the airline code and flight numbers could not be found anywhere, including on the airport site. They could not explain and would not offer any other help. In the end, it turned out they used yet another third agency for part of the booking. I had to call that other agency and was told: Opodo sent me wrong booking codes and wrong flight numbers. I was able to get help from this other air service in the end and check in. But had I just shown up at the airport, I would have been very likely denied boarding and lost my flight. Will never ever use these guys. Really shoddy and sloppy, to say nothing of the customer service.