Same problems with the engines as the S76C+ models in hot climates - the engines fail to meet power assurance minima and have to be rejected early. It seems the Arriel 2 series engines don't like hot climates, no matter what type they're installed in and have problems maintaining power margins around 600 hours.
The other problem with the N3 is range. It has the same fuel capacity as the other N models, but fuel consumption is up to 305 kg/hr at 140 kts TAS at lower altitudes.
The twin engine power is excellent and it's good for 'hot and high'. If you're heavy and flying at altitude, don't be surprised if the first limit you reach is the collective top stop, before getting to any engine or transmission limits. You'll still get at least 140 kts TAS though.