A godsend for Cerebral Imaging. Behind even one piece of taxing ICE it can be too expensive for the runner to make it worth doing anything about, and it'll save your bacon after a Siphon, especially if you have no economy in hand early.

I love this card, I really do. I think if it were 2 influence I'd be much more inclined to take it out of faction.

There's not a lot I can say about how the card works that hasn't already been said by Jashay's excellent review below.

The problem with it is that it's a card that really only synergises with certain IDs: basically those that thrive on one or two big runs a turn. I'm going to separate the runners here in to three categories: Good Synergy, Some Synergy, No Synergy. I don't think there's any runners where it is explicitly anti-synergistic, but there are definitely some where the influence cost is way too high coughIaincough.

Good Synergy

• Rielle "Kit" Peddler: Transhuman: Obviously. The WITR decks really originate with everyone's favourite Tai Chiborg. You can make a not-code gate a code gate, but only once a turn! It's extremely beneficial to know where to direct than once a turn ability.
• Quetzal: Free Spirit: Same as above. You can waltz through a barrier once a turn using your ID ability and e3 Feedback Implants. I find when playing Quetz that the ID ability triggers less often than Kit, but I might just be a crap Quetzal player.
• Nasir Meidan: Cyber Explorer: Oh, Nas. You and your wild Hail Mary runs. Wouldn't you like to know the best place to be Stimhacking?
• Edward Kim: Humanity's Hammer: Did they just leave that Scorched Earth on top of R&D? Go kill it!
• Whizzard: Master Gamer: Did they just leave that Adonis Campaign/Jackson Howard/Dedicated Response Team/So on and so forth on top of R&D? Go kill it!
• Valencia Estevez: The Angel of Cayambe: If you're relying on Blackmail runs, knowing where to go can save you a lot of frustration.
• Ken "Express" Tenma: Disappeared Clone: Bonus 2 inf make it easier to stomach, and gives you the ability to choose whether to The Maker's Eye or Legwork.
• Laramy Fisk: Savvy Investor: Anything that bloats the corp's hand synergises well with Ol' Larry. You can force them to draw a card that they left on R&D too. Free R&DI!

Some Synergy

• Noise: Hacker Extraordinaire: Can be useful dependent on the build. If you're not planning on running very often the extra info can help to determine the decision.
• Reina Roja: Freedom Fighter: Early synergy in combination with making the Corp rez ICE more expensively on a server you want to run, but tails off late game when the rezzing is done.
• Andromeda: Dispossessed Ristie: If you're running stealth Andy, knowing where to spend your precious Silencer credits is a boon.
• Leela Patel: Trained Pragmatist: Can tell you where to go in order to trigger your ID ability, but doesn't sync directly.
• Hayley Kaplan: Universal Scholar: Some Hayley builds require maximum click efficiency, and having a predefined target helps with this.

No Synergy

• MaxX: Maximum Punk Rock: Hits hard and often.
• Gabriel Santiago: Consummate Professional & Silhouette: Stealth Operative: Generally pointed at HQ.
• Iain Stirling: Retired Spook: Way too much influence to splash for the benefit that it would have of being able to target your runs when you are behind.
• Chaos Theory: Wünderkind: Has better things to do with her time.
• Exile: Streethawk: Honestly I'm not even sure this ID synergises with the game. May never be played again now Armand "Geist" Walker: Technolord has been released.
• Kate "Mac" McCaffrey: Digital Tinker: Strong enough already without the info and can rarely spare the card slots.
• The Professor: Keeper of Knowledge: Isn't a program so why should he care?
• Armand "Geist" Walker: Technolord: Haven't had a chance to play any Geist yet so I don't know, but I can't see it.

This card. THIS! CARD!

It's another invisible ETR for Jinteki. Not only is it out of Yog.0 range, it is crucially out of YogReady Eyes range too. Given as how that's a big concern at the moment this can be vital.

What do I mean by Jinteki Invisible ETR? Well, it's a card that against Jinteki the effects of which make continuing the run inadvisable at best, or deadly at worst. The sort of card that, if it fires, would make the runner want to jack out in all but the most desperate of circumstances. It makes eating a Snare! is much harder to recover from, shuts off I've Had Worse draws, and makes taking any amount of net damage that much harder to recover from.

For a measly 1 inf it splashes in to HB Brain Damage decks really well, too.

They should rename this card Murderer of Anarchs.

Depending on how the game is going I'll try not to rez this unless I'm confident I can pick off a runner. I've rezzed 3 Cortex Locks ever, and every time it has flatlined a boistrous Anarch with no breakers installed.

Thanks to Chrome City, the orange bastards are everywhere these days, and for 2 inf this is not a bad splash as a Surprise! sort of card.

In faction it is tasty. Against most Jinteki IDs runners will run on a minimum of 3/4 cards in hand so they don't fall foul to a nasty Snare! If they have 0/ 1 programs installed at the time it can be game over there and then. No one seems to expect it, and if they do they don't seem to account for it when picking their hand size for running. Even if it doesn't kill them, reducing a runner to 0 cards in hand during a run is basically a good ol' Jinteki invisible ETR. In PE, a good deal of what they could then access would kill them, and it's not much more attractive in RP, IG, and so on. If they go down to 0 or even 1 cards they're going to jack out.

Combos

Lockdown is another beautiful card. Pop a Lockdown, then Cortex so they can't trigger I've Had Worse or draw up again before your turn, and you can really put the fear of God in them.

Port Anson Grid: Make them carry on running in to your Data Mine! Force them to access the Snare! or Shock! you know is on top of R&D for some reason! Jackson all of your agendas out of Archives before benevolently letting them take 3 Shi.Kyūs for 0 credits! Basically anything where them having to continue the run is going to kill them or set them back significantly.

Neural EMP: Especially in combination with Lockdown. Beep....beep....beep.

You get the idea.

Problems

Gets exponentially worse as the game goes on (in most matchups anyway), but a lot of Jinteki ICE is so spiky that it can transition in to a bluff role later on in the game. The uncertainty could buy you then turn you need to score out your winning agenda. Or you could just chuck it in Archives and install something meatier instead.