I got a Domino 500 Yesterday and tried it out today by doing the flipper alignment test, which came out perfect.
I was surprised that I needed to touch-up the end of the #5 domino with a quick swipe on some sandpaper so it would start in the mortise hole (poplar on the side grain).
I was also surprised that the two systainers were shipped in a big box with little padding and were allowed to just bang around against each other during shipping. Obviously not Festool's fault. Still, everything is in one piece.
I'm building a one-drawer night stand and using the Domino for frame and panel sides and for attaching the webs to the sides, and so on. I already built a 4-drawer version of the piece without the Domino, so I'll be interested if it helps as much as I hope it will.
This seems like a easy-going group mostly, so I'm looking forward to being a part of it.