Poland post worked good, in my case. The package arrived in the my country, Romania, but there is no information afterwards. Yesterday, after a few days of no updates, I contacted Posta Romana. They answered in a few hours. My package is processing in my destination city. They also suggested I should track the package on their website, but they do not show package location. I am currently waiting for the package RR900311435PL. So my issue is with Posta Romana rather than Poland Postal Service.