I have never used any of there products on older machines.... But I have bout a few of their pc boards with the CUBE remote as rick calls it.
I have used them on a few 300D's and I love them.... they seem to have a good product only thing I can say is make sure to take time to install it right or have it done, if not it can come back to give you trouble.
Also if you have it installed have who ever installed explain it to you...... because these remotes are a little more complicated.