I have read mixed reviews on this. Some said it was so crowded, they didn't really enjoy it, but it sounds like you had a good experience!
I can give you both sides of the coin.
I went with my Mother (age 70), my wife, our two sons (ages 15 and 14), my sister and her husband, and their two daughters, (ages 13 and 16).
There were definitely a lot of people doing it at once, like 40 in our group with 2 guides, and another group in front of us, and another group behind us. So if you don't like being close to strangers or if you are looking to be alone in a tranquil setting, this is not the trip you are looking for.
Furthermore, at the beginning, they suggest you all hold hands. This wigs out some people as they feel that they need their hands free for stability, or that others holding their hands might cause them to fall too, plus at least the first and last person in your group will be holding hands with a stranger.
Now for the good parts. We had a great time.
My Mother is 70 and the immediately put her at the front of the group, holding the hand of the guide. She became an inspiration to the group. If she could make it, everyone could.
My niece is often skittish about these things, but sandwiched between my two sons, she had no choice but to go on and enjoy it.
My Brother-in-law didn't want to get wet, so he stayed on the wooden staircase next to the falls. From there, he could see us all, interact with us all, and take pictures of us. He could also have entered at each of Pools at various points, if he wanted to get wet but not climb. In this way, this excursion accommodates a lot of different activity levels. If someone in our group couldn't do stairs, there was a paved path, farther from the falls, where they could at least have seen the bottom and the top of the falls and watched as their party started and finished the falls.
The only person, ironically, who didn't have a completely good time was my older son, the mountain goat. He wanted to run up and down the falls like the guides were doing, but he was asked to stay with the rest of us. Good practice for him following directions at least. He liked it. He just wished he could have been less restricted.
We were able to bring our own cameras in the falls, and the guides also shot a video that was available for purchase at the end. $40? $20? I forget.
