Intermatic has a GREAT product, if only they would allow it to be great! It is not a technical issue. They have a firmware version 39 that allows full access to all functions of the PE653 by any z-wave controller. But they have not released this version broadly, and will only install it themselves to avoid the firmware leaking publicly. I had to send mine into them, wait about 3 weeks, and they sent it back. They say it is for use use by property managers who need remote control, and it opens up every function of the PE653. I am using it with an ISY994i, but it should work with any z-wave controller.
This could be a great product, if only Intermatic would release this firmware broadly.