I'm making a new review because I disagree with seige's...
The Effect
As copied from Penguin...
The Ultimate Close-Up Linking Ring Routine!
This marvelous routine features one eye-popping, magic moment after another! And thanks to the inspired structure, the rings can be examined before and after the routine!
Learn "The Shake Off," "The Edge Link," "The Crash Link", "The Blow Off", and more!
PLUS 8 BONUS SANKEY ROUTINES!
Dowsing: Jay's IMPROMPTU version of the classic Paul Curry effect!
Economic Risks: The mentalist puts his money where his mouth is!
Hot Date: The coin transpo you can do anytime, anywhere!
Sudden Triumph: Think "Dai Vernon as a hired assassin."
Kung Fu Coin Change:A 3-phase routine full of new moves!
Collateral Damage: Deadly easy vanish & appearance of a signed bill!
Menage a Trois: An ingenious mental sandwich effect!
Yes & No: Jay could've sold this killer card effect as a separate item!
Cost
Standard...$29.99
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)
Well...the linking rings are about 2, and the effects range from 2 to 4.
Review
I got this mostly because Sankey says, loud and clear, that the keyrings are examinable. They're not. I repeat, the keyrings are not examinable. If you handle them right, they look like they've been examined, but they're not.
Apart from that, this is the same as any other linking ring routine. The keyrings are a nice touch, but they're too big for standard keyrings (at least here they are) so people know that something's funny.
The bonus effects, IMHO, are a lot better than the linking rings. Yes and No, especially, has got its own part as a prediction routine (audience freely chooses a card, card has "Yes" written on the back, all the other cards say "No").
EDIT: I would like to point out that I made this review just after buying the rings, where I was still a bit new to the whole magic thing and not having learnt that sales pitches are misleading.
If you have spent almost any time in magic you will probably know how the linking rings work. That's not the point, and I should have known that

Overall
It's not a totally new effect, but then you shouldn't have expected that. What it is is a new rethinking of a classic that makes it a very workable solution for the linking rings close up. 10/10!
The bonus effects are worth it, though.