I test drove the sq4 here on Friday. Here's my impression
Look and feel:
The cars front looks a lot better than the rear in person. IMO the rear could have benefited greatly by having a bigger boot spoiler like the QP as well as a small rear bumperette right between the exhausts like found on the QP. It just doesn't look "complete" compared to QP. Perhaps something for the aftermarket to take care of.
The car needs 20 or 21 inch wheels to look right. 18,19 in wheels make it look funny , almost cartoonish because of the round fenders.
The rear seat space is almost insultingly tiny. I'm 6 feet and I moved the driver seat back to sit comfortably, then I went back and sat down right behind the driver and my knees were cramped like sardines. The rear seat room is on par with maybe 3 series at most. This is the biggest disappointment IMO about this car. An 90k you are getting same room in the back as a 3 series...
The car I drove was equipped with premium sound which was quite nice ( although I have nothing to compare it to )
The electronics are ok but not great. There is a slight lag when switching functions (ac/radio/etc), but it's bearable. BMW and Audi s systems are several levels magnitude more advanced then this one, but it's definitely usable.
Driving & handling
The handling and breaking and ride is fantastic. Steering is light but precise. Throttle response is quite sluggish even in sports mode. You literally have to punch the pedal to make it go. Once it goes you feel a wave of power come on and you go fast-ish. Power subsides at the top end pretty abruptly ( as the case with lots of turbo v6s ), so if manually shifted you need to pay attention to engine "sweet spots". Power is strong but not violent. Honestly I think it's probably a 5 second 0-60 car rather the 4.5 like some were hoping. Hopefully aftermarket software will address that in some point in the future
Overall: I'm still pleased with the car overall but it's far from perfect. I'm still getting a white sq4 like in the pic , despite few disappointing features about the car. This is going to be my wife's car and she absolutely loved it because of its compact "feel".
P.s. For reference I owned the following cars before : 540i, e39 m5, e60 m5, 911 tt ( current )