When it comes to boiled eggs, this definitely works, but I'd recommend using a knife to open it up as it will shatter a little when trying to pull the 'line' apart with your hands after using this device. Strangely, it's actually fun to use this and I was impressed that it fit on my egg as I buy the 'large' size.

The good thing about this is it's very durable and strong. The bad is that it does take a few practice runs to figure out the exact strength and knack to getting this device to work. I wasn't sure if I was supposed to just let it drop, or throw it. I did the 'throwing' method to move the ball and that worked well for me, leaving an even line on my egg shell. It certainly makes it easier to peel after!

Note: I tested it with a hard-boiled egg.


SUMMARY
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Pros
+ Leaves an even line.
+ Sturdy, metal implement.
+ Works with boiled and non boiled eggs.
+ Fits larger eggs.

Cons
- Takes a few tries to get the strength right.
- A little confusing to use.

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Note: I received this product at a discounted rate in exchange for an unbiased, honest review as provided here. As a consumer advocate, I believe in providing quality and honest feedback and receiving a product at a discounted rate will never affect my opinions.