There was a weird glitch in the sales system that meant I didn't get this key for a couple weeks. That's no reflection of the product, itself, but is worth noting. If you have ordered this and it seems stuck in "processing", shoot them an email.
The key case is really amazing. As an engineer, and one that has worked with small injection molded parts, I can say that this is VERY well-built with amazing tooling with tight tolerances. For the GX470, it is the easiest swap-- no shimming required. The buttons need to be installed in the case before popping the fob in, but they are all keyed, so it isn't easy to get it wrong. The screws thread in nicely and don't feel easy to strip. Not that I'd ever use the metal key, itself, but it fits very snugly in the slot provided, again, without need for shims.
One thing that would maybe take a 1/10 star off the rating is the material is very easy to scratch, especially when installing a key ring onto the fat key ring slot. It's always a shame to put marks in a brand new toy, even if that toy is likely going to get scratched the moment it resides in a pocket with other keys. Another 1/10 star off because the website doesn't make it easy to tell which color is which. I had to guess and probably would have been a bit more adventurous had there been a chart showing each color with its corresponding name.