I've been using it about a month for ALL shipping (mostly USPS, occasional UPS). Overall I like it and it's saved us a ton of money already (by being able to use Bound Printed Matter vs. only media mail on Endicia), but there are design flaws aplenty and bugs (I mean, it's an AMAZON product after all). Today for example it was showing RETAIL commercial rates for First Class Mail International instead of COMMERCIAL rates like usual. (Other mail classes WERE showing the correct rates.)

Also, if you make a mistake (easy to do at first) with postage, I have yet to see a refund for postage in our account, even after a month. Will investigate further to find out when to expect said refund.

Note that we have almost no interest in the "inventory management" aspect of Veeqo -- it's actually annoying for us.