I just installed this, and I'm surprised at how well it's working. I had to launch the file explorer from the quick launch button to install the start menu fix though, because every time I tried to click on start the phone locked up. It's getting better after every soft reset, and things take a long time to load correctly, but it looks like this will hold me until whenever HSPL finally comes out. Animated backgrounds work too
On a related note, I did try to interrupt the customization process before installing this... it looks like it's just not possible. If you try to soft reset while it's in the customization stage (the bar at the bottom of the orange screen) it just takes you right back there, and by the time it's done everything's already loaded. :/