 I purchased a 2015 Q50s 3 days ago and waiting till Monday morning to call and negotiate a return.  I will write my upfront and honest review about the vehicle after putting it to the test the past 3 days. Please keep in mind I come from a 2010 535i RWD Sport. First impressions the Q50s seems like a top competitor in the sport sedan market , it is anything but. The acceleration isn't anything impressive , the car severely lacks torque and it shows. The cornering in 'AWD' kicks in when needed and is absolutely horrendous. It causes severe understeer  and instability. The ride feels very cheap and unstable as well. The seats aren't great and overall the interior feels cheap. The Bose 14 speaker system could be better as well.  There are other little things like non power steering wheel with out the - Deluxe Pkg.. I am sorry but for a mid 40s sedan to have a manual adjusting steering wheel is sad. If you want a reliable commuter car -Q50s ( I say the term 'S' lightly haha) is for you. If you want a real sport sedan with a solid drive , precise handling and impressive acceleration then the 335i/535i is your vehicle.