absolutely fantastic.
I got my children addicted to spam as a "treat" when we went camping, and my oldest was absolutely blown away with this when we went to a Hawaiian restaurant one time and I ordered it for him.
This was my first time trying it and now I realize it's just a tasty bologna style meat in a weird form factor. Even my cat likes it (though he really just likes the ham water). Spam hate is overrated.
This recipe is pretty good, but you don't have to get that fancy. I usually just fry the spam up in a pan until it's crispy, put a slice between two layers of rice, and wrap it up in the nori (seaweed). It also tastes really good if you dip it in Bachan's Japanese BBQ Sauce, they sell a big bottle at my Costco.