Los Pecanes are a great place to stay for a few days if you want to relax, watch birds or go for a canoo tour. It is so quiet - a real contrast to Buenos Aires. It's 90 mins by public boat with only 3 boats per day, so it's necessary to plan ahead.
The rooms are nicely decorated with ensuite bathrooms, but quite basic compared to city-hotels (e.g. without TV, WiFi, Phone). The food is homemade - the desserts are the best.
We stayed for 3 nights in January and were the only non-argentinians. The owners speak English very well.