As a mentalist and not a card guy anymore, I'm always amused by the way some current world-class mentalist will take a hoary gimmicked deck out of mothballs and use it to great effect. The card guys just roll their eyes and think things like, "Tut. Tut. Look at the mentalist, such a simple soul, he's using a gimmicked deck from the 1940s to force a card. Awww, that's so cute. We cardicians know 50 different ways to force a card using Marlo/Vernon sleights that only took steady daily practice over a decade to master." Perhaps I exaggerate, but while sleights are great and pure, I love the way you can take something simple and easy and be just as effective. Luke Jermay uses a Franklin Taylor peek deck. Richard Osterland, much earlier in his career, came up with the Radar and Dynamo decks, variations on the Bagshawe/Koran deck, before abandoning them in favor of his Breakthrough Card System. And if I recall correctly, Derren Brown wowed a TV producer with a Mind Power deck. There's no shame in using a gimmicked deck if you are a professional and know what you are doing. If you are an amateur, there's nothing to see here. Go back to working on your classical force until it's perfect.
When I first looked at Knight's Exacalibur Forcing Deck, I wasn't impressed because it seemed so...so...unnecessary. But then I read more, smiled, and thought, "Hey, if it works (and it does) why the heck not?" Do I personally need an Exaclibur Forcing Deck? Naw, my Psychomatic Deck or Phil Deck does the same thing. But just like there are Chevys, Fords, Toyotas, and dozens of other kinds of cars, variety is a good thing. Check this deck out. You may not need it, but it relies on a good, interesting theoretical concept. If you are an aficionado of trick decks like I am, you'll get it. (Maybe some day when I'm bored, I'll trot it out and fool 'em with it.) And if you want to really tick your card-sleight buddies off, show them how well it works on civilians.