I'm a US expat living in the Netherlands.. In general, my experiences have been better with USPS than with UPS. Unfortunately both services seem to expect you to be home all day to receive packages, and apartments here do not tend to have guards or any secure place to leave packages. If I'm very lucky, one of my neighbors will take it into the building and leave it at my door. If not, since I work fulltime, unless I can arrange to work from home on a given day, I have to go pick it up at a local stationary store a short walk away (USPS) or at the facility on the other side of my city (UPS). Last December I had a package get lost, possibly in Customs, for about 6 weeks. (Fortunately it was from LL Bean and they sent me a replacement.)
There also seem to be other delivery services that leave packages for pick up at places more or less convenient, but I think those have mostly been for packages I've ordered from within Europe.