Please do not trust the 5-star reviews!
Completely stole our money. Did the whole seat upgrade thing but I didn't care as the tickets were still much cheaper than any other site. Paid for in January and received a flight confirmation from the airline. This morning I went to check-in and received an error. Called Delta and all of my tickets were suspended by Farecorner. Delta also let me know that these people have scammed many other people. Delta couldn't release my tickets to me, there was nothing they could do. I called Farecorner and they keep telling me there's a request in with the airline and to give them an hour. Now we're rushing to find other plane tickets and are out a lot of money. Please do not fall into their trap.