It does indeed import scale readings when shipping a package. I use USPS flat rate boxes mostly, so that is not a feature I take advantage of currently, but it might come in handy at a later date.
The software has a 30 day free trial, I recommend just downloading it and giving it a shot. I fell in love with it immediately. I have it interfaced with our Endicia account and it updates the online status of our eBay and X-cart orders to mark them as shipped. It also handles sending the confirmation of shipment emails and the importing of tracking numbers into both eBay and X-cart's order management systems to allow easy tracking by the customer.
I hate to sound like a fanboy, but this software rocks in my opinion.