Hi, I brought Elise the day she came out and at first it's hard to learn how to use her properly. So don't give up on her when you're playing her terribly for first 5-10 games.
Once she is learned and you can use her abilities instinctively she will seem OP and you'll dominate the game.

Pros:
- Good fun and won't get boring quickly (lot of abilities)
- Many ways to play her (Bot, Mid, Solo Top, Jungle)
- Good throughout the whole game from Early to Late (Good Sustain)
- Great ganker
- Gets kills easily.

Cons:
- Hard to learn and master.
- Squishy if not played properly.
- Hard to harass some champions on mid. Teemo

I almost always use
because that cool down reduction will make a difference in team fights.
but if you're having lane problems with another AP take

Choose:
or
(Ignite is better choice as Elise already is capable of chasing down champions.)
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or
(This is up to your preference but I prefer Ghost as it helps you keep hitting the champion you chasing.)

It's hard to farm in human form as low damage and slow attack.
Farming in spider form with your spiderlings and using (W)
as most as possible along with (Q) to finish off the target and guarantee that kill.
REMEBER, Spiderform takes NO MANA so use those abilities!

It takes time to perfect using your abilities to do the damage output Elise is capable of.
When going into a team fight or just 1vs1 use this sequence.
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Start with human form.
Take off some health with (Q) & (W)
Once ready to go into spider form, just when ready use your (E) to Hard Stun your opponent.
Once (E) is used, immediately go into Spider form (R)
Start attacking him with (W)
and once the attack is finished attack the champion with (Q)

If champion is not dead by this time, go back to human form and Hard Stun first him with
(E)
and then use (Q) & (W)
following by going into spider form (R)
and repeating the sequence.

REMEBER, Use your (E) when in spider form
to chase down your opponent or take off some opponents from hitting you so you don't die so quickly.
ALSO being in Rappel your abilities are still cooling down so when you go back into the fight you can use your combo again.

Sorry that the abilities don't have icons. Mobafire must fix that.
GOOD LUCK, HAVE FUN & TRY NOT TO KS ;)
By McAleer