I installed my expressive speaker lighting into Foo Fighters and it's amazing! Only going to get better as Stern continues to code new light shows.
One note for those planning to do the same - the instructions suggest pointing installing the lights with wires pointing up. This won't work for Foo. The long orange wire isn't long enough to make it all the way down to the Expression lighting board. I even re-attached the added board as far back on the cabinet as I could, and there's still a lot of tension on that long orange wire when you open the speaker panel.
I think this product is exceptional, makes a big big difference in the immersion and is a very easy mod to install. Highly recommended!