Highest compliments to the staff for being kind, accommodating, friendly, and helpful. They took time to learn my name, and authentically engaged with me. I had an unexpected issue with my knee so wore a brace and used poles to help me walk more securely. The staff helped in any way they could, without being overbearing. I stayed in the beautiful Smithsonian Room the first night, then the Casona Lodge for 4 nights. I still have two nights to stay but so far it is quiet, despite the shared space. I booked in January and the private rooms were booked for my time period, so be sure to book early. The Smithsonian overlooks the garden and I saw hummingbirds and toucans from the patio outside my room. The gardens and nature are varied and beautiful. All the walkways, restrooms, and facilities are well maintained and clean. They offer complimentary transportation as the property is very spread out. Each time I called the van arrived within 8 minutes or less. The food is varied, and very good. I set up some off-site tours in advance and reception assisted when I needed to make changes. The pool is in a beautiful setting. The bird watching, night walk, and other tours onsite were excellent - let by knowledgeable and helpful guides. I highly recommend staying at the Arenal Observatory Lodge and Trails.