This was a great tour that my friends and I really enjoyed. We got lucky and caught a clear day during the rainy season. The drive and the Arenal volcano surroundings are very scenic. Baldi was also fun and relaxing.
Pros:
*Nice full-day of activities, without being too burdened by a tour guide or pressured to buy things
*Delicious lunch
*Great tour for a first time visitor to CR

Cons:
*Long drive from San Jose (3.5 hours on a bus)
*Dinner buffet at Baldi was just ok...lunch was WAY better
*Detour to drop folks off at another hot springs resort was LONG and along some very rough terrain