This skill is useful to gain board presence. Warrior type monsters such as The Fiend Megacyber or even Warrior Dai Grepher are easily summoned with great stats. However, relying on this skill alone is not recommended for ranked games.
It seems like whenever I use this ability and send a warrior monster into my deck, I get back the exact same card most of the time. Often happens even with cards that I only have 1 or 2 copies of in my entire deck.