Two friends and me did the Cachoeira do Amancio ride with Eduardo as our guide.
Eduardo's English was excellent and he was flexible with the day and time for this trip. It was about 45 minutes to an hour drive (he picked us up at our hotel) to the starting point. Other than a brief stint on the shoulder of a highway, the rest of the ride was on dirt roads with little to no traffic.
The ride takes you through farmland and we stopped a lot for pictures, and two or three times for some coconut water and empanadas. We saw ZERO tourists!
I agree with the moderate rating. Some of us rode every hill, some had to walk the bike up a few hills but I don't think anyone was exhausted afterwards.
I suggest plenty of sunscreen and perhaps a bandana or something else to cover you if you burn easily.
This was definitely the highlight of my 3 days in Florianopolis! A well organized tour.