I hadn't intended to review this site but after reading Frédéric's review I thought I will add mine as well as there are both similarities and a few differences that may be of interest to others. I visited the site end of June 2024.

I took the night boat from Iquitos to the Peruvian-Brazilian-Colombian border, stayed one night in Colombian Leticia and then flew from Tabatinga to Manaus. I had considered the lengthy boat ride but decided against it as it seemed not very plannable (I could not find trustworthy schedules on internet), meaning I would have to plan about a week for it to 'fit' reliably into my schedule. And it seemed rather boring too. The afternoon propellor flight provided good views over the rainforest and the rivers and was reasonably priced. After a night in Manaus and exploring the parks in the outskirts, I took a late Sunday afternoon shared taxi to Novo Airao from near the bridge which left within 5 minutes and took about 3,5 hours.

I stayed 2 nights in the local hostel, I was the only guest in the dorm. I had initially booked a hotel but they cancelled a week before stating urgent renovations. Next morning I looked for a captain to take me to Anavilhanas. Prices quoted were 400 BRL but one captain whose number I got from the hostel, seemed very keen, and I negotioted 200 BRL. It was a 2 hours private trip, the captain was a kind and calm man, and I enjoyed it. I especially liked the few parts where we drifted slowly through the flooded forest with the boat engine off, hearing the silence and the birds. I saw just a few birds and a few glimpses of dolphins but nothing else.

I decided not to go to the dolpin platform, as it seemed a zoo-like experience to me. Next morning I took the shared taxi back to Manaus, this time it involved a wait of more than an hour to fill up. From Manaus I continued overland by bus towards Guyana.