Hi Alan,
Loads of fellas here have done and are doing very well on enzalutimide. I hope it's the same story for you.
My husband, Allan, had Abiraterone, the alternative to enzalutimide, but with abiraterone you have to take a steroid as well so I think enzalutimide seems better in terms of side effects. Am sure one of our lovely fellas on enzalutimide will be posting on your thread soon.
Sorry to hear your wife passed a few years ago, my Allan died just over a year ago so I can understand.
Also please know there are several treatments still left for you and more coming along all the time.
Good luck x