I've only bought my GT-T recently, so I can't say definitively long-term wise, but I've owned a number of performance cars in the past and feel-wise, you can tell that this is really a supercar as soon as you sit inside it. It belongs more to a GT class and is great on high speed corners and straights. I don't think it'd do as well in gymkhanas or is as agile as, say, an S2000 or S15, but its like a big brother for them.
So far nothing bad to say about the car both reliability wise or performance.