I have them for my '69, but haven't mounted any speakers in them yet. I have a set for my '66, but never found a speaker that I liked well enough that would actually fit in them ... they're still sitting on a shelf in my garage 2 years after I bought them *LOL*.
I just dont think there is enough room behind the kick panel to accomodate a good sized speaker. Doug's design incorporated the tweeter in the kick panel also, which isn't optimal for sound staging. I used component speakers, surface-mounting the tweeters on the a-pillar (required new small hole for wires) and building custom mid-range speaker cabinets for the 5.5" diameter mid/bass speakers that sit in the footwell. I have them so you can move them around for staging or tuck them just in front of the seat for getting in and out. Secured from moving too much by wire cable to the seat frame.
Dont' have any pics of them yet but they turned out nicely. Tiggermom has some pics of hers which are similar.
I bought a set from Doug also. The fit and finish are fine. I agree with the other comments about speaker size, but I think these panels beat the alternative of cutting doors or f/glass IMO. The only issue I had with fit (when the speakers are installed) was the emerg brake. I had to modify the mounting to allow the pedal to release properly. After that no problems. By the way I got 6 inch speakers into the pods.......just. ::