Never used this site before so after reading about it decided to give it a chance. They had the best rates. Bought tickets for my son flying from Chicago, going to Brussels with a stop in Dublin, then back through London. When booking online I got an immediate call from farechamp to authorize my credit card & lock in the rate. I was able to sign the authorization from my cell phone- pretty neat. The person was very helpful answering my questions & gave me tips like I was booking with British airways but need to check in at Aer Lingus.We did not have to change anything once flight was booked. But all went as scheduled. Thanks farechamp! I have had other flights to book & tried this site but rates were better elsewhere so it always pays to check around.