I did not found the caveat that you referred to on the
www.hyundai-gpsmap.us website. I did not visit every available page, but I did not find it on the pages that applied to my 2013 R-Spec.
I used the "Chat live" feature to ask whether the update is "owner installable" or "dealer installed". I was told by online agent Chevas (after he checked his resources) that the update IS owner installable.
I also called the Contact Us phone#. (Note-the phone# shown on the website did not connect, so I used the # from the mapnsoft site). The agent I spoke to confirmed that the update IS owner installable. She told me that lots of people have ordered it. She also told me that the
www.hyundai-gpsmap.us website is a new website.
So, I set up a New Account on the website. They ask for your
VIN and Device ID as part of the setup. After that, I put the update for my Genesis in the "Cart" and ordered it. It will be shipped via FedEx Ground and should arrive in about a week or less. I'll try to keep you posted to let you know how the delivery and installation goes.