Very nice stay...
My wife and I honeymooned in Niagara and chose the Hilton but were a little apprehensive due to negative reviews. Our stay was, however, exceptional. Our room was wonderful with a great view of both the AM and CA falls, the location of the hotel is excellent, the staff was nice and the restaurants in the hotel we very nice.
A few words of warning, however: We reserved a room from floors 15-21, but were put on the 27th floor without comment or explanation. The room was more expensive, but it was so nice we didn't want to move. Basically, check every detail when you check in and check out. I should have said something, but my wife and I really loved this room.
Another thing to note is that the pool area is in a bit of disrepair. The Waterfall was never on and there is a lot of peeling and cracking on the walls and stairs. The pool itself and the whirlpool were very nice however.
Also, there is no free wifi or high speed internet access. ($19.95 for seven days) C'mon, Hilton, really?
The construction work that people are complaining about is NOT that bad. We didn't hear much of anything but I know they were working the entire time we were there.
Ultimately, my wife and I were very satisfied with the service and staff. We loved our meal at Brasa (You have to try to the Garlic Rump Steak, trust me...) and the breakfast buffet was excellent. Coleen, the housekeeper, was so very nice and friendly. The valet was very quick, but expensive. Overall, I hope to return to Niagara someday and the Hilton will most likely be where we stay.