First, before you even think about buying this album, LISTEN TO THE SAMPLES!! I cannot emphasize it enough.
This does not sound much of anything like Iron Maiden at all, and don't get me wrong, I love the use of unconventional instruments in tribute albums, such as The Piano Tribute To Iron Maiden, or the orchestral versions of the songs "Dance Of Death" and "Blood Brothers" found as the b-sides to the Wildest Dreams and Rainmaker singles.
If you're still not convinced, as to why I hate this, I'll explain:
It's not the instruments, nor the vocals, it's the slaughter of the songs themselves, they don't sound anything like the songs themselves, the riffs are completely different, and even The Trooper could be easily mistaken for something else.
This album is a scam, probably created under the assumption it would sell because Iron Maiden fans are typically hardcore collector fanatics.
DON'T GET THIS ALBUM!!