This is a new favourite card for me. I can't help but feel it's most powerful out of faction; I'm running it in Anarch, Valencia Estevez to be precise, and it is so much fun. Anarchs have got some incredibly juicy events recently, and allowing you to chain them into one another (or into econ events) gives you incredible efficiency.
Draw cards, like Diesel or Inject, are great with Comet as they allow you to play one of the cards you have drawn straight away (this even works with a Levy AR Lab Access!). Same with Déjà Vu, this lets you pull a card back to HQ and play it for a single click.
As you're undoubtedly running event economy with this card (the more events the better! I have 30+ in my Comet deck), a set of Prepaid VoicePAD seems like a sensible inclusion, with enough events they become cheap drip economy. Also, with frequent playing of events, a way to continually fill your hand makes sense, something like an Earthrise Hotel or the Wyldside/Pancake combo that lots of people are enjoying at the moment. This also makes the console great in a MaxX deck, she will generally pack lots of recursion like Deja Vu or even draw like Inject, both good as mentioned earlier.
On top of all that, the card allows for some great combo plays; Day Job into a run event (like Dirty Laundry or Blackmail is possible), or even a Wanton Destruction to trash three cards from the corp's hand followed by a run event to check archives straight away before the corp can prepare defenses. The 'run all three centrals' cards become better too, allowing you to use a run event as your third central run and then play Quest Completed or Notoriety for free, giving you a spare click (to play ANOTHER Notoriety, maybe...?).
Ultimately, in the right deck, this is like an extra click on most turns, for half the price of Rachel Beckman without any of the vulnerability, that also gives you a dot of memory. Clicks are a very valuable resource, hence why cards that give you more are rare; they're typically one shot, or come with a heavy downside. Comet isn't either.