My 2.5 year old son LOVES trains, so it was clear to us that we have to take him to on this attraction. Overall the experience was very nice and organized well. We were taken by a shuttle from our hotel and also had a shuttle back to the hotel arranged.
The train ride was about 1.5 hours in total with a nice break in the middle for sugar cane tea and cookies and light hiking in the forest. My main issue is that as this is mainly a kids attraction I would expect the tour to be a bit more kid oriented with activities/explanation more for kids, but I assume they are keeping it focused on the entire family This might be boring for people who really want to hike, but after spending the day before in the Monteverde rainforest it was a very nice additional experience for my son. It is also overpriced, but so are all of the attractions in Monteverde, and this was by far the best one we did.