The ease at which I can upload, configure my email account for sending through secureSend is very easy! It's also super fast when it comes time do actually get an answer back as well (usually within 24-48 hours).
There are some minor bugs that have been reported but they're being worked out quickly by their customer support team so no big deal there either - just keep using them until those issues resolve themselves :) Really nothing bad about this service other than maybe having more options would be nice if you don't want your recipient always seeing who sent what file. We use our own domain with SMTP authentication enabled however we still wanted people outside of us not able access/see emails coming into or going off of mail servers hosted elsewhere without adding extra steps like forwarding addresses etc.. This does exactly that allowing me control over where messages go after leaving server rather then relying solely upon DNS records provided via MX record setup.