DGD wrote:
I've never used a GPS, but don't you have to put in a start and finish "address"? How is that done in CR?
Good question. You aim for a famous point of interest and then look for the exact place. (Just like the locos do but without the GPS

Case in point, I used EPA as the starting point to find the dentist's office and then I knew that 90210 was only a block or two down. Once there, I added it to my favorites as a reference and for future use.
As others have posted and it is also in my quasi trip report of last week, I used
Waze and it worked like a charm. I drove around as if I was a native. When using any GPS, situational awareness is the key; something I learned from my days of being a pilot. If you think you need to go about one hour and the GPS tells you three hours, GPS is wrong so double check, cross check – just do not follow blindly. Know roughly where you are or ought to be at all times.
In CR Waze was so good that it even told me about police presence and congestions many times and 90% of the time it was correct. (Waze does that by other people reporting)
In a nutshell, it isn’t Google maps or Garmin but the best free one for use in Costa Rica.
PS: You will need data connection at all times for Waze to work.