I hate giving 1 star reviews but my golly does this place deserve it! I echo everything else other dissatisfied Yelpers have said: this is a very, very unfriendly place.
I understand all of the upcharges for packing and shipping, but now PostNet wants to charge you for dropping off your pre-stamped packages! I went in last week with one Priority Mail package that had a prepaid label. I just wanted to drop it off while I was in PostNet (to buy more shipping supplies for my small business, by the way), and the super rude and condescending guy behind the counter told me there would be a "$5.00 charge" just to drop of my package. I don't think this is true because they've never charged me before, but a $5 charge was almost as much as the postage on the package cost!
Of course I was ready to walk out but the guy TOOK MY PACKAGE and basically held it hostage! I had to beg for him to give it back to me and finally he did. He was one of the rudest and most unfriendly people I have ever dealt with anywhere, period.
Needless to say, I went down the street to the UPS store to buy my $100 worth of packing and shipping supplies. I'm a small business owner and I'm not in the business of getting ripped off. Avoid this place.