Good experience, a bit pricey
The ride was good- aerial view of the falls was very beautiful. They charged $85 per head (with a requirement of minimum 2 people, and max of 4). The part I did not like is them asking for a tip at the end. I felt like they were begging for it, sort of, and paid them.
I've also heard that else where (not near Niagara) for this price you get almost an hour long helicopter ride, and here its just around 10 minutes. So by that standard, this is pricey. But if you are not really looking at the cost-value equations, ride and the view is very enjoyable.
For photographers, this is a good opportunity. Though the helicopter is closed, it has a window that you can slide open and put the camera out through. That allows one to take good pictures. Even other wise, I saw that the glass doors were pretty clean, and hence I could take pictures across the glass and they came out good.