The problem is the method is very limiting and not easily reset. It also requires the purchase of something from a magic store that you may not already have, so the price just went up a bit, and you are going to have to wait for the mail or a run to the magic shop to perform this.
The effect requires a gimmicked deck. During the performance, you are going to disturb the deck in a way that you can’t immediately perform this effect again. In other words, this is not for workers.
As for amateur magicians, I think there are much better methods, either gimmicked or not to achieve equal or better similar results.
VERDICT
There are much more powerful and effective ways of accomplishing this sort of effect. If you are interested in a really easy way, using a gaffed deck that can be reset in an instant, I suggest you check out Vibe by Bob Solari. If you are interested in effects that have similar hard hitting results without gaffed decks, there are a ton of options, most will require some practice, and I suggest checking out any of David Williamson's DVDS, where you can learn not only good magic, but good entertainment as well.
Available at your favorite Murphy’s Magic dealer
Product info for A Forced Thought (Download)
Author: Himmel, Steven Publisher: Murphy's Magic Supplies, Inc. Average Rating: (4) Retail Price: $4.95 Buy Now
The magician riffles the deck to allow the a spectator to think of a card within the deck. The deck is shuffled and handed to a second spectator who begins dealing the cards face down one at a time until they want to stop. The card they stop at is the thought of card. The use of this subterfuge allows for very clean predictions and revelations.