I booked with Opodo just from Cardiff to Paris. The return leg was with an airline I'd never heard of - Enter Airlines. I was given no information regarding the check in with Enter Air other than a booking reference. I needed to know which terminal to go to (Paris CDG is massive, terminals are miles apart) so rang Enter Air. Enter answer with a recorded message saying they don't deal with Customers direct and to contact my travel agent. I spoke to three people at Opodo, all of who simply put the phone down when they couldn't answer my call. Never did find 'Enter Airways' and had to buy a ticket elsewhere.