The company I work for as an Administrative Assistant uses the Stamps.com program. I do almost all the mailing, so I use this program on a daily basis. It is great. It is so easy to use. It faster than taking all the mail down to post office and having them weigh it and ship it. We do a lot of mailing daily, so it comes in real handy.
The company bills most of the customers that do business with us, so the cost codes come in real handy. We can just assign each customer their name and at the end of the month, we can figure out who gets billed what. The program is a very user friendly program that is very understandable. We have the printer and a Dymo label maker hooked up to the program so we can print directly on an envelope for the usual mailings or we can print to the label and stick those on the envelopes that are larger. If you mess up a mailing it is also very easy to get a refund from the program. They have a special place to go and all you have to do is click on the mailing that didn't work out and click refund. It will put the refund directly back into your Stamps.com account.