Had the chance of testing almost everything of the FFT+ during their prelaunch test drive.
Switch from HE 1.8 straight away to it, not only because of the indefinite wait but also totally won over by the FF features.
I think it was because of the pre-launch thingy, I had the luxury of testing almost all the features especially the torque vectoring at work, rounding a round-about and still feel very planted. Loved the driving dynamics and the car handling.
There doesn't seemed to be much interest with the FF online or over here, not like the HE (already got few threads before launch and few FB groups).
So for your info, I'm probably one of the early adopters of this car. I have been driving it for a few days now, yes, got it not long after the official launch and I'm loving every bit of it.
Of course, there is no perfection, especially for those at the back seat.
I agree the spaciousness is not there.
However if you compare the back seat space with HE, I don't think much difference though. I might be wrong, cos I have been waiting for ages and then suddenly got smitten by FoFo, you get what I mean? 
For the HE 1.8 price, I still feel paying premium for a few things that are lacking.
FoFo is even higher price, over 15k but still I feel there are many features only available on higher end cars.
Other than park assist (which I don't really need), it has cornering lights too.
This is a 'drivers' car as some reviews said. You feel like sitting in a cockpit. 
Power-wise, I felt it is much better than HE especially that I cannot get myself to accept the throttle delay of the HE even after test driving at least 2 times. What can I say, it is sexy, and I don't think FF can beat to its sexiness, but it won almost every other things that I can observe of which I feel is more important.
I've only had it for a few days, so I can't comment much yet, but just wanted to let owners-to-be know, this is absolutely a driver's car.
Of course, my concern is with the FC and also the maintenance after the first 6 free ones.
Let's pray it'll go well. 

Oh btw, to use the text messaging on the sync, for it to read your sms, you need to have a phone with Bluetooth AND with Message Access Profile.