On June 6th, I went to the local post office and mailed a small package to my daughter in Seattle. There are details in the post here.
On June 29th my daughter got a notice from the post office that a package had arrived. Apparently the postman tried to deliver it while they were at work and didn’t leave it at the door, not sure why because I didn’t request that on my end.
But, 23 days later, the package was at my daughter’s post office! So, it worked, and in just slightly over the 3 weeks that we expected. I wouldn’t mail anything critical or time sensitive in the Panamanian mail service but if time isn’t a consideration, Panamanian mail is a good option. It cost me $2 to mail a manila envelope with a little Cuban dress for my granddaughter, and now she has it just in time for their warm summer weather.