I was there last April and I thought it was pretty easy to get around. The buses were nice and went pretty much everywhere on the island. Taxis were well regulated for what I saw and probably half what I would pay for a similar ride back in the States. The one thing I did find is that it's a pretty big island so you probably don't want to try and visit a lot of parts of the island on the same day. Maybe take a taxi to the first place you want to visit for the day, then visit a couple on nearby attractions by bus, and at the end of the day take the bus back. Google maps was able to route me to wherever I wanted to go by bus.