Very durable. Key and transponder fit perfectly. Has a nice dent near the top where your thumb comfortably fits when you turn the key. Only thing that prevents a 5-star review is the area around the panic button. On the factory key shell, the panic button sits in the plastic so you don't accidentally press it. On this shell, the panic button sits out further than any other button. I've twice pressed the panic button while the keys were in my pocket. Not the end of the world, but something to be aware of.
Almost perfect. Almost.