Noise's ability contains one of the rarest and most powerful effects in all of Netrunner: the ability to FORCE the Corp to do something. We have forced de-rez cards and some rare forced trash effects, but Noise is in a league of his own. His ability alone forces the Corp to build a certain way; if you don't have Jackson Howard in your deck, you had better have a plan for your archives protection.

There is almost no downside to his ability. Putting a Cyberdex Suite in the trash could lead to some bad times (heh), but other than the nightmare matchup with IG, trashing Corp cards is just a solid move. He's very versatile and can be horrific to deal with.

Noise vs. IG isn't actually as bad for Noise as it seems, as IG decks normally run a lot of assets, and little ICE. T —
oops. accidentally hit enter there... Anyway, against an IG deck that will out-economy and then out-attrition the runner, Noise can mill you, and use the glory of the Imp to negate the trash costs. Against an IG that tries to win by agendas, then Immolation Script and Cutlery can slow him down enough to mill his fast cards. I'd almost say that Noise's worst matchups (non tag-me) are Astro-Biotics and Blue Sun —
Blue Sun is the worst match up for 90% of runner decks. —
I think Noise has undergone a lot of change since the core set. In the core set, he had a very cool, different, and powerful ability- but one that would only trigger maybe 6 or 7 times in a game. Now there are an endless supply of viruses, meaning he will probably be milling a card from R&D at least once per turn. 3 Jacksons can't begin to keep up with that, especially when they may get milled themselves. Cyberdex will be great in certain circumstances, but many times, Noise players don't particularly care about their virus counters. Since most of them cost 2 or less (and this is forgetting about possible cyberfeeders) these viruses actually turn into money with Aesop. Using a click to trash the top card of R&D and gain money?... yes please (the most outrageous example of course being the cyberfeeder, grimoire, cache, aesop combo). Now with Faust out, he can make almost any run on the few occasions he needs to. Anyway, he just seems to be super powerful now and hard to play against. —
The new NAPD changes hurt Noise a little. The parasites cost more and clone chips. But he has 3 Deja Vu's to compensate. He is still grossly overpowered. —
The new MWL has finally put a bit of a restraining bolt on Noise. I honestly was thinking the only way to fix him would be to release several cards that were not only good against Noise but also useful in any deck (this would probably mean ICE that was antivirus but also had an EtR sub). But the new MWL has several cards on it that were staples in Noise decks. Now Noise could still include 3x Wyldeside, 3x Parasites, 3x Cache, and 3x Aesop but that is it. No room for Faust or D4v1d in this build! I'm elated at the change. I only play casually on Jinteki.net and honestly had flat out refused to play against Noise for the past several months. He was too powerful and not fun to play against. This change will make it fairer to play against him. He is still a strong contender though. —
In a surprise move, Noise is rotating out. I think this is for the best. —

It's extremely versatile with a cost to match. 1 click to play (make sure you're not tagged; it IS a resource), and then it essentially turns any event in your heap into a "double" type. Basically 3 clicks and the event cost to recur. It's steep, but it allows you to select whichever event in your heap would be most appropriate to the current game state. Even that part comes with a catch; if the most appropriate card would be Maker's Eye, but they're all still in my stack or grip, I'm s.o.l. It's popular for obvious reasons in Blackmail and Siphon recursion decks, but man... that cost is steep.