Has pretty decent stats. It can increase up to 1800 with the Field Spell Yami.
It has an effect that could see the set cards of your opponent when you normal summon it and during each of your Standby Phases.
Even though it has decent stats, there are still a lot of Level 4 or lower monsters that could surpass it. Especially when Yami is not on the field.
Can't immediately activate its effect when Special Summoned.
Destroy opponents back row
By using A Man with Wdjat's effect, you can see the set cards in your opponent's back row. Having that knowledge, you can utilize the effect of Nobleman of Extermination and De-Spell by targeting the right set cards.
This card is glitched right now. In my last game I had him out. My opponent set a monster and one card face down. I was able to see the face down card when his effect triggered and could still target the set monster revealing another card in same turn.
The part that says cons in this article implies that you have to normal summon this card in order to use it's effect. That is incorrect. The effect states "When you Normal Summon this card, AND during each of your Standby Phases, select 1 Set card on your opponent's side of the field. Pick it up and look at it, then return it to its original position." This means that even if it is special summoned, it's effect will activate each standby phase. The part about normal summon just says that it's effect also activates when you normal summon it. One final detail is that it's effect only activates if your opponent has a face down card on the field.