The Effect
(more detailed description at
http://www.expertmagic.com/html/store/colorfusion/cf.html)
Your spectator chooses a card from a blue-backed deck, fold it into quarter and then sign their name over the whole face of the card. Then, you tear off a corner of the card for them to hold as a "receipt" while you perform the effect. You then proceed to VISUALLY change their card from blue to red - a quater at a time, while stopping to verify it's still their signature! Immediately after changing the color of the card, without any funny moves, you hand the card back to the spectator. They take their blue-backed "receipt" and match it up perfectly with the new red-back card.
Cost $22 (for the download version - more expensive for the dvd)
Difficulty between 2 and 3 depending on which routine you're doing
(1=easy to do, 2=No sleights, but not so easy, 3=Some sleights used,
4=Advanced sleights used, 5=Suitable for experienced magicians only)
Review
To be honest - the main reason I bought this was because I had to know how it worked. When I bought it I realised I had sort of figured it out, but the review I'd read had combined all of the various versions of this effect into one - which really confused my poor brain.
Having said that, this is a really good effect. The instructional video/dvd has a lot of detail and goes into everything you need to know to perform this effect in minute detail, so from that point of view, you're getting a lot for your money. He also teaches a few alternatives to handling the effect - some easy, some more difficult.
The gimmick is quite hard to make and you need a new gimmick for every performance, which could be a bit painful, but apparently it gets easier as you do it. I say 'apparently' because I've been too busy to actually sit down and do it, which of course means I haven't performed it yet.

Overall
Whle I've yet to perform this effect I don't regret getting it. From the demos I've seen and reviews I've read of people using the effect, I think it is a visually powerful and astonishing effect. It also has the memory value of the spectator keeping the card. Color fusion is definitely on my to do list. Hopefully sometime later in the year I can give a more complete review
