It has saved us a significant amount of money. Once I must have measured wrong and paid for a larger package than I shipped. After a few weeks pirateship.com emailed me and told me, they then gave me the amount as credit for the next time I used pirateship.
They have lower rates than USPS, and USP, we once saved over $30 compared to the post office.
Post Office to Raise Rates to 73 cents from 68 cents
