here is my review on the spam burger is that it is a good burger but 15 or 20 minutes after having it you will wish you never had. the cheese, the onions, and spam all combine to make a good flavor combo in my opinion.
i would give it a 6.5/10.
if you want to try to make it you can try to make it here: https://recipesmadewithlove.com/spam-burgers/