Yes, it is expensive at around 200$ pp for a 12 minute flight, but it's a lifetime memory and worth it - so just do it.
It was a fantastic experience - great and unforgettable flight over NYC, and my very first on a helicopter.
TIP: if you're about to have bad weather, just call them and reschedule, like we did. Only 2 hours before our initial flight on May, 2 we asked them to reschedule us for tomorrow due to bad and cloudy, rainy weather. They approved that within minutes.
Company to recommend.