Los Lagos was recommended to us as a good place to visit with our 12 year old daughter because of the fun slides and various pools. For our daughter this was good advice, as she had lots of fun on the various slides and slipping in/out of the different pools, some hotter than others.
The food was average at the swim-up bar. The pina coladas in the pineapples were fun to drink but the burgers not that great. If my wife and I were on our own, I think we would have preferred one of the other smaller hot springs, but for our daughter it was what she was hoping for.
As a place for couples to enjoy, I would rate it a 2/5, and for kids a 4/5... so averaged out for this review... a 3/5.
For a family traveling with kids this would be fun for them.