Nothing really wrong with Spike's Delight. But if you look at the ingredients list and nutrition info, it's basically the same stuff as a mid-grade cat food.
Here's the first four ingredients and guaranteed analysis of the
regular Spike's Delight:
Chicken meal, extruded yellow corn, soybean meal, extruded brown rice
32% protein, 12% fat, 6% fiber
Now compare that to, for example, Natural Life Feline Adult:
Chicken meal, ground whole wheat, ground yellow corn, corn gluten meal
30% protein, 12% fat, 3% fiber
Fairly comparable overall, I'd say.
But there's one big difference here. Including shipping, that 5lb bag of Spike's Delight will run you $25, or $5 per pound. The Natural Life, on the other hand, you can walk into your nearest Wal-Mart and buy a 4lb bag for $7.48, or just $1.87 a pound!
Like I said, nothing really wrong with Spike's Delight that I'm aware of. It's just that you're paying double the price for what's really just a mid-grade cat food.