I stayed one night at the Marriott Fallsview and found the hotel was excellent with respect to the room, cleanliness and the friendly staff. The valet parking was promp and easy.
I would recommend this hotel and I will stay there the next time I'm in the Niagara area.

I stayed in this hotel for one night to get a good view of Niagara Falls at night all lit up. I chose the Marriott because of the high rating on Tripadvisor (which I always do), but I think this is one time where Tripadvisor didn't really live up to its recommendation.

The rooms at the Marriott are certainly lovely and the view of the falls is spectacular. The rooms are clean, the beds very comfortable, and if you get a room with a jacuzzi in it it can be a very relaxing experience!

The staff are extremely friendly and helpful. Unfortunately the rooms are not very soundproof and I had a terrible time with noisy kids on the level above which has really put a dampener on my experience there as I was hoping a quiet relaxing night in. But the staff tried to help - I think though that I would have been more impressed with an offer to change rooms.

The only negative which stopped me rating this review 5 stars was the cost of everything. As other reviewers have said, this hotel is extremely expensive and to have to pay for wifi in your room on top of this, as well as pay extreme prices for food and drinks (one glass of club soda will cost you $4.50!) is a bit ridiculous. Breakfast should really be included for the price you pay here, especially after all the taxes are added on (everyone needs to be aware that a room will cost you at least an additional $30 than what you are originally quoted). Also, the person manning the tourist information desk didn't seem to be able to answer simple questions like where the nearest supermarket or mini-mart was and sent me on a long walk only for me to find out on my own there was plenty of places very near the hotel.

All in all, a good hotel, but my guess is there are better value for money hotels around with equally spectacular views.

Oh my gosh- the view from our room was incredible. You felt like you could touch the falls. The breakfast was fantastic- breakfast buffet was to die for!! We checked in about 11 pm because of a late flight, and the bellmen were "resting" and couldn't stop visiting with each to do their job, I thought oh no, but once u got past them, the people at the front desk were great! I couldn't get the coke machine to work, and the manager went and got me TWO! The rooms were so clean. This as a perfect place to stay!

We stayed in this hotel in early August 2012 during a brief stay in Niagara Falls. This is a lovely, well-located hotel with a tremendous view of the Canadian falls. Valet parking was convenient and hassle-free. The checkin staff were friendly and helpful and the waitress at dinner was pleasantly-mannered and attentive without being overbearing or intrusive. The food was beautifully-presented and delicious. Breakfast was OK, a fairly ordinary buffet and the waitress on duty was nothing special. Checkout was efficient and we were able to leave our bags and car at the hotel while we spent some time at the falls.
My biggest criticism of this hotel is the lack of free wi-fi. When you're paying $350 a night, there are some things you expect to be included. If starbucks can offer free wi-fi for a customer spending $3, surely a Marriott can.