I just received mine today (Thanks for the fast shipment Zach & Nicole) and I'm very happy with the outcome. I have limited space for a collection so spending some extra $$$ on each of the machines I own is okay for me. I have toppers on all of them including getting the upgrade recently for the Medieval Madness Remake.
I actually like the look of it. They could have gone a number of ways for a topper and I like that they've done a crypt theme. The Elvira popping out is fine as well. From what I can tell in attract mode, it opens up a little further than when just in test coil mode. So, I'm guessing the software will influence how much it opens.
It would have been nice to have other options as companies like Tilttopper really do make great alternatives to the Stern toppers. Hopefully that will change soon so that everyone has multiple options to consider.