My wife and I came to Dominica on our honeymoon. We found Extreme Dominica's canyoning tours online, and booked canyoning for our first day. The owners, Richard and Liz, were fantastic! They helped us get to know the island and we ended up doing 3 separate outings through them.
We went canyoning twice it was so much fun. We learned how to rappel on their training wall, and spent several hours jumping and rappelling from pool to pool, working our way down the canyon. We videotaped the adventure on a mounted helmet cam, it's definitely worth the extra $50. On our second trip down, we rappelled down the 200ft+ Trafalgar Falls waterfall. It was one of the most intense experiences of my life.
Richard and Liz also have great connections with some of the best local guides. Their guide Nahjie took us on the 6 hour hike to Boiling Lake, where we got some of the best pictures of our entire trip. Highly recommended!