I am an experienced user of home automation to monitor my homes. I currently use HomeSeer w/HStouch, ElkM1 w/eKey, EverfocusDVR w/mobilfocus, and Pentair Controller w/Pentair over the internet on my iPhone. I use a cisco router configured to port forward to the appropriate host and use DynDns for DDNS service. All of these applications were easy to set up and just work the first time remotely over the internet.
I have installed an ISY99 w/Moblinc into a vacation home and have had nothing but problems connecting remotely. I have never been able to connect through my DDNS service. Until recently I have been able to connect by configuring MobilincPro by entering a numeric fixed WAN IP address (not a preferred method), now with the recent upgrade that doesn't even work. I know that all the ports are forwarded properly because I can connect remotely to the ISY from a MAC laptop just fine, the problem is strictly related to the iPhone app. I understand that you now offer Mobilinc Connect, most likely because nobody else could get it to work reliably either. However, many other companies have mastered the iPhone interface without resorting to a relay server, there is no reason Moblinc can't offer an easy reliable direct remote interface as well.