After requesting a review of this item, I decided to get it myself so I'll write my own review here!

The Effect
Synchronicity by Black hart
http://www.blackhart.co.uk/page99a.html
Cost
£17.50
Difficulty
(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)
1 - This is all in the presentation and your ability to act...
Review
They say: "Your volunteer takes part in a test to check whether they have the ‘synchronicity’ with you that is necessary to take part in a series of psychic experiments.
They are handed 5 jumbo sized ESP cards, they mix them up, they chose one at random. They mix them again and hold them fanned out face down in front of themselves. You now instruct them to drop the cards face down one by one until they are holding just one face down ESP card.
You ask them to name the ESP card they they chose and they do so. Now you ask them to turn over the ESP card they they are holding and it is the one they they chose at random.
Throughout this presentation you emphasise that THEY have chosen the Tarot [sic] card, and also that THEY have handled the cards THEMSELVES and that THEY mixed them up.
There are NO forces involved. Everything can be examined afterwards.
Comes with a velvet drawstring bag with 5 pointed star on it to keep the ESP card in - very stylish"
I say: This is nothing short of brilliant - so Kudos to you Keith!
I was a little concerned when I read the method but decided to try it out before making a judgement.
Tried this on my girlfriend and at the revelation she dropped the card in disgust, and said I was Satan. Possibly a fairly strong reaction but always nice for that to be the first thing said to you about an effect!
The method is super sexy with NO funny moves, no weird maths effects or anything and absolutely NO forces - you genuinely don't know which card they picked until they tell you.
The absolute best thing about this is you can do the effect with ANYTHING; photo's, playing cards, birthday cards, scraps of paper with people's names on a la "Living and Dead Test"
The bag that comes with this is also of nice quality and will hold my rune cards nicely - so really I was getting two thigs for the price of one!
Overall
I want to say 10/10 because this effect is so good and so versatile but I can think of a couple of really small things which would make it even better.
I'll have to settle for a 9/10 I'm afraid!
Well worth investing in for any budding mentalists or bizzare magicians