While there may be 1001 ways to force a card from a normal deck, each has a level of suspicion. I personally like to tell a brief story about the 1000 ways, then demonstrate in a reveal method a few fairly obvious ways to force cards in a routine. After that, I ask a spectator to shuffle, then lay out the force deck "ribbon spread" and say, "Without any influence from me, and without me handling the deck at all, please freely choose." Then I say "This is the only way I have come up with that there can be no force of any card, a completely random and free choice". It's a very solid seller, then move into any reveal method you choose.
These decks are great for a variety of solid card effects, the draw back is you are good for about 1 trick per deck, per performance, two if you are ballsy and have a clever enough remark to follow why they have freely drawn the same card twice. That's why I own several force decks. It's a small draw back given the strength of the effect you choose.

Great for forces but also really good for making gaffs with (especially T and R effects). You can also make you're own svengali decks using a one way force deck.

I would recommend getting at least one of these decks to put in your magic box because I find they always come in handy.