Lovely car but the 1.6 petrol is thirsty and the CVT gearbox is irritating. Also, looking at second hand value, a petrol Qashqai is next to impossible to sell on so unless you're getting it for half nothing, I'd say you'd be better served looking for a diesel. 

 

As far as reliability goes, they're solid but check the rear suspension for clonks, knocks or sagging and make sure all the electrics are working.