I have an Intellibox Classic which works fine. What has always disappointed me the about the Intellibox is the ramshackle feel of the buttons.
Normally, I mainly drive using Rocrail and hardly touch the Intellibox. The keys that I use the most are the red and green stop and go. The ones located top right, under the logo. They send the LocoNet OPC_GPON & OPC_GPOFF commands.