I have been a daily user since 2009, combining orders from Amazon, eBay, Etsy and my web store. As the STAMPS.COM company grew through acquisitions and mergers (e.g., Endicia), the stability of their technical platform has gone downhill. Every software update that I have installed over the past 2 years has had bugs, many of them serious. Getting to speak with a second tier technician takes at least 30 minutes and once the bugs are identified, you have to wait until the next software release for it to be fixed. Of course that next release is likely to have its own new bugs. Pathetic Quality Assurance and very frustrating as a user.