I FINALLY GET A HAND AND YOU DON'T WANT ME TO PLAY?!DESIGNED TO PERFECTION
When done right, a Slow Player can net a much larger hand then if he had played the pocket Aces as the non-Slow Player. That is, with a huge pre-flop bet. That's because the Slow Play is designed to keep at least one player around for a while. The huge pre-flop raise is designed to take down the pot right away so no one gets lucky and cracks the Aces. Certainly there's something to be said for that strategy.
The Slow Play is also designed to give the opposition a sense of security, and often works best when they are actually dictating the action. The Slow Player constantly looking like he's on the defensive and considering folding with each subsequent card. Imagine how the plan could play out if an Ace actually hits on the flop.
PITFALLS
The flaw with the Slow Play strategy is that even monster hands win. And the longer you allow marginal players with marginal hands to stick around, the more likely they are of making a hand. That's why even the staunchest of Slow Players will at least raise a little before the flop. Hopefully, pare down the pool to only a small few, and then back off after the flop.