I admit, at first I was not sure about buying tickets from a third party website, but after I saw that buying directly from the club isn't an option (their tickets to that match were sold out) I choose Football Ticket Net which were the best options of all the other sites we choose.
Me and a friend attended the Arsenal – Tottenham derby and we had a wonderful time.
All the others who wrote here bad reviews about this company complaining on prices – need, in my opinion, to understand that in this businesses the price per ticket for high demand matches will be above face value 99%.
I knew that – but it was important for me to know that I will get the tickets in time to my hotel (got them 2 days prior to the match), will have good seats (as promised) and they customer service team was really great.