We arrived at the falls real early, about 9AM. We were on a cruise ship but booked with an outside tour company. We were only the second twosome to start the climb. Both my husband and myself are 60 years old, no spring chickens. We went up with out a guide. Later I heard from others that it is not nearly as fun with a guide ( maybe safer) but not as challenging. The rocks are slippery and many a time I thought I would be killed. I fell several times but always in a pool of water never on the rocks. Like was stated earlier the last 10 feet are the most slippery and my husband fell strait up and landed flat on his back, fortunately not hurt. Once done you have a great sense of accomplishment . When we were leaving hordes of cruise ship people were pouring in, we heard it was very crowded, but not for us, there were very few on the falls and no guides. We went out the way we came in, don't follow the exit signs, they will lead you into the market area where you will be harassed incessantly. We were able to leave and never once were bothered by anyone. One bit of warning, the next few days your leg muscles will be very stiff and sore if you haven't worked out prior to the climb. I am still walking like Chester from Gunsmoke.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.