The system is easy to use, user friendly & very responsive when it comes time do ship or pick up my packages from local post office/mailbox etc.- It's not always accurate regarding package location at USPS locations (sometimes they are wrong). I like that we can track our shipments online but sometimes there isn't an updated status after several days which makes me think something went awry during transit - maybe due too much weight? Not sure if this has been addressed since moving into new facility however would love more notifications about delays / tracking updates so i know what happened while shipment was en route! Tracking parcels using US Postal Service website allows us access anytime anywhere via mobile app allowing efficient work flow within organization.