The Niagara Falls American Side Highlights Tour was a great tour and Debbie Carlson was a great tour guide. The tour was approximately 4 hours and made several stops. The tour included the Maid of the Mist boat ride, which I highly recommend. You may get a little (or a lot) wet, depending on your preference, but it's worth the experience to get that close to the falls and see the front of the falls, which can't be done on land from the American side. I assume this is why people say it's better from the Canadian side, but I don't feel like I missed anything after being on the boat ride.
Debbie was very personable and informative. She was great with my 12 year old daughter and 10 year old son. My parents (72 and 80 years old) were also on the tour and they enjoyed themselves. There is some walking during the tour, but if members of the party are not up for it there are places to sit and relax.
Debbie points out all of the highlights so that if you want to go back at another time you're already familiar with the area and can take your time.
I highly recommend this tour.