I daily'd my GT-R for a year and a bit, get ready to pay for petrol (avg. 14L/100km).
Apart from that, if suspension is relatively standard, it's fine. I have a heavy arsed clutch and stiffer suspension, bigger wheels/low profile tyres and some suspension bits changed.
But Sydney's shitty roads and traffic will leave you shitty after the drive.
Reliability wise, they're fine. No different to any other turbo car (maintain it properly and it'll be fine).
My car has ~150,000 import km, AFAIK unopened engine and standard turbos/boost/ECU/etc.