I first used this company after I tried unsuccessfully to claim against Icelandic Air for a delayed flight. It was worth the fee I paid, as I got zero trying to claim myself. After this successful claim, I then decided to ask airdelay to act on my behalf against Vueling Airlines, who had ignored all communication from me regarding a claim for a delay. It took a significant length of time as the case had to go to court. Airdelay kept us informed of the proceedings and on Saturday I received a cheque for £750. Again the fee of 25% was worth it as 75% of £1000 is way better than 100% of zero, which is what I got when I tried to claim myself. I would definitely recommend this company...successful on both claims.