Please be careful when renting a moped... I've been to Cuba many times and have sort of gotten acustomed to this kind of transportation. Anyhow, I try to be extra careful regarless.
I have seen many people get badly hurt, I would say on all of my trips... brokes arms, jaws, and many stories about flying off the road. This IS the best way to get around, just be careful:))) That's it!
Also, please don't go chasing after animals and picking plants that you don't recognise. In this part of Cuba they have very attractive flowers and plants of which some cause very bad alergic reactions and are poisonous. This goes for trees as well.