I had miracle blades for probably over 10 years - they always were sharp. Then I bought an expensive set of knives (different brands, generic block) - most work great, but the expensive steak knives cut less effectively by far than the miracle blades did. They have a finer serration though.. the miracle blade was not quite the same as other serrated knives I have owned.

It's a funny thing really.. but the miracle blades were actually a really decent investment. : )