We did this last week. Here's my review.
We boarded the bus and the guide gave us a tour as we passed through the city. On our way up the mountain, we made a quick stop overlooking a resort called La Jolla Mismaloya. This was a picture stop for about 5 minutes to look at the resort and beach below. The view was very nice.
We finally arrived at the "jungle" and was sorely disappointed at the scenery. When I think of "tropical jungle", my expectations were lush greenery landscape everywhere. Unfortunately, it was dry and brown everywhere. Others from our group complained of the same thing. This was because the Puerto Vallarta rainy season is from June to October, and when we were there, it had not rained at all since last October. When you guys go, it may be different since it will be rainy season and the guide said they are expecting 70 inches of rain this season. Some parts of the hike were a little bit difficult for the kids because of the steep inclines and the terrain. They showed some gum trees, pineapples, coconut palms, etc. You had to cross a shallow river to finish the hike, and the water was only a couple of inches high. We were with a 5 year and 7 year old, so at times it was tough for them, but they hung in there and finished the hike without much complaining. It wasn't too hot, maybe 75-80 degrees, but there was also some breeze, so it wasn't like we were sweating buckets. This was in the same region where they do the Canopy Adventure excursions.
We were served lunch at the the conclusion of the hike. The food was OK. You have a choice of chicken, beef or fish, plus a soda There is also a river near the restaurant where adults and kids can take a little swim. The water was shallow, but during the rainy season the water level is typically deeper. They also had pinatas where kids can participate, and this was fun for them.
On the bus ride back, they drop you off to go shopping for about 30 minutes before you head back to the ship.
Overall, we were disappointed because we were looking for something lush and tropical and we didn't see that at all. Of course, it's a different story after there's some rain. The other parts of the tour (city tour, swimming, pinata party) were OK.
Hope this helps.