01/05/2017 i booked return flights from Gatwick to Prague for 6 people. for February 2018. Outbound was with Smartwings TNGMTO and return was with easy jet ES6C6WM. The outgoing was in the evening so my kids could go to school for a full day. After paying i got the reservation numbers. I then tried to log onto smartwings to reserve seats, could not log onto the flight, i did not worry as i had just recieved the order confirmation. Logged onto easyjet, i had to register, then pay a bit extra to reserve seat and extra baggage (snowboard and suitcast). I waited 3 months to then try log into smartwings to reserve seats, the website could not find my reservation. I called smartwings in germany i think and they could not find the flight, Called opodo and it was difficult to communicate with there call centre, but as it turns out, the flight was cancelled. OPODO did not contact me about this, so i had to pay for new flights for the 6 of us while OPODO tried to get me a refund. It took about a month and i got a full refund for the cancelled flight. For the new flights i logged onto easyjet and found a flight the same day at 6pm so my kids had a half day at school. the flight was 60% full so if i had found out a bit later it could have been very costly considering i had booked accommodation and car rental for or arrival date. I have used OPODO again for another trip to the USA this year, flying in October 2018. 3 flights, first Gatwick to JFK, second JFK to Las Vegas, third Las Vegas to Gatwick. The 2 flights from and 2 Gatwick are with Norwegian Air. I fell a bit misled as when i tried to reserve seating i had to pay quite a bit extra Almost £180 and i will have to pay roughly the same if i want Meals on the flights. These prices should have been highlighted when showing me the deals.