This service is extremely buggy. When it works, it's good but there are too many times when it simply does not. Forget about customer service, there is no such thing. Emails are not responded to for days if at all and if you are resourceful enough to find a contact number deeply entrenched on the web, you'll get an voicemail and no return call. I relied on their service to send time sensitive documents to clients and employees and they royally screwed me. Their blatant dismissal of my extremely urgent situation is absolutely horrid. They seem to be run by a single guy who rolls into work whenever he wants and may or may not assist you when you need customer service and believe me, YOU WILL need it with this product!