We sell Insteon products including the Hub and ISY994 (new ISY99) in Canada and my initial feedback and advice is that they are two different products aimed at very different markets. The Insteon Hub is meant to be for somewhat simple installations and to make the process as easy as humanly possible. If the router supports UPNP and it's turned on, one can install the app on their iphone/android device and it will find the hub and you can add devices, create scenes, add cameras, set up basic schedules, set up alerts, all from the phone. It's actually pretty slick. My basic testing with Android is that it works quite well. I admit I haven't tried sunrise/sunset times. Will have to look at that.
Yes, definitely had/has some bugs and they are working on fixes (all owners received an email a couple weeks ago giving an update on the plans and progress). I honestly believe for the target market it's leaps and bounds better than the SmartLinc in this regard. Definitely not a perfect product but it's OK in the current state and definitely getting better as they move forward. They are actively adding new features and fixing bugs.
To jpclement - who had the keypad linked to another device and when controlling the devices with the hub the keypad didn't respond... this is the nature of the set up of Insteon. What I mean is that unlike X10 back in the day, when you control 1 end device you are NOT controlling anything else including scene controllers. If you want to have the keypad button also respond you need to tell the Hub to toggle the SCENE not the DEVICE. If the hub doesn't know about the scene (eg. it was a link/scene created manually) it won't be able to do it.
The ISY994 shines when it comes to more advanced installs and programming. The ISY994 can do ALL the linking, set on levels, ramp rates, create scenes. You can do it in the ISY or you can get the ISY to spider to find/learn about devices and scenes. You can program it with basic on/off times or complex schedules. You can add conditional logic. (if the front door opens, and it's between 8pm and 11pm on Monday-Friday and the light isn't already on, turn it on). You can also expand it with other software modules for network controlled devices, turn it in to a mini web server, add a weather module to expand the logic, etc. You can look for extras like double tapped switches to execute programs too.
So I think one needs to figure out if they're looking for quick and simple or more advanced. All of this of course is simply my 2 cents as some feedback and to use in the decision making process. Hopefully it helps.