Hi,
I bought an Insteon KeyPadLinc and Insteon I/O module to control my garage door. It works great but I hated the price. I then discovered X10 and bought the $80 deal which includes the CM15A, software and a bunch of modules. Great fun, I have been driving my wife crazy with lights randomly switching on and off..lol
Anyway, my KeyPadLinc has a bunch of unused buttons with status lights as I only needed 2 of the 8 for my garage. I thought it would be cool to use the status lights to show the on/off status of some of my lights. I gave the buttons the same X10 address as an X10 module and it works horribly. The KeyPadLinc misses about 50% of the X10 commands. I put an X10 AM486 (appliance module) in the same socket as the KeyPadLinc and the X10 module works 100%. I put the CM15A in the socket next to the KeyPadLinc and it still is only 50% good.
Just to let you know, Insteon stuff seems to work well when talking to other Insteon stuff but don't buy it to work with X10. By the way it does transmit X10 commands OK.
Andy