BUYER BEWARE!!! Stamps.com hides the fact that they don't work on MAC computers (apple) and charge you service charges $15.99/month plus shipping and handling of additional machines until you figure it out on your own. THis is such a scam! They later admit that if you look in the fine print under terms and conditions, you will see it does not work with Mac computers. Legalized stealing is what I call it!!! They have opportunity after opportunity to end the service - but they continue to suck you dry until you figure out on your own. WHY... read full review »