we went there to hike the puma trail, they ask you to get a guide. We paid 20$ in toal for an english speaking guide (in spanish 15$). The track leads through nice cloud forest and offers a few nice views, well, if its not cloudy or hazy. The whole track is along steps so I don't know why you would need a guide. You cannot get lost and its not a challenge to walk either. Ok, exhausting but the guide cannot help you with that ;-) We saw a few people without a guide - I would recommend to just walk the trail alone. Its well signposted and nobody is checking when you walk in, as there are othe rtracks for which you dont need guides anyway.