I have flown a number of flights through the new T3. Better traffic control outside newer/modern look alcohol available in bar/restaurant many gates with walkways fairly efficient check in and passport control departing. The bad - business class lounge (they just opened a second Egyptair this last week) are poor - the attendant told me they would be opening up a nicer one in a matter of months frequently claim a gate is open when it isn't so you walk all the way and are stuck in a hall with a bunch of other people in front of the closed gate (and you have to go through security again) and on arrival the scene at passport control is pure chaos! I spent 30+ minutes in the business/first class line because they allowed individuals with group passports (5-10 passports in a stack) to cut ahead of the business and first class passengers in line! The other lines were extremely long and extremely slow. And also bad is you still get stuck using a bus despite them having open gates and the drive from plane to terminal is a good fifteen minutes. So overall I'm pretty disappointed and actually preferred terminal one with its McDonalds Starbucks and Cinnebon (none of which have a franchise in T3).