Pros:

-You're all alone!!!
-Much like Last Man on Earth, but without any specials
-Much more common infected.
-Open door... Horde waiting on other side
-Start with pills

Cons:

None

Conclusion:

Amazing Mutation!
I actually found this difficult but fun to play on hard mode.
Piece of advice to players, don't have a magnum and a shotgun at the same time. You'll get horded easily. :P
As a let's player, I will definitely make a series from this mutation.

Pros:

-Great choices for the witch music.
-The lullaby matches perfectly with her before she is startled
-Makes it more tempting to startle her :3 
-Startled witch + Music + Fire = an amazing game of death tag on Realism or Last Man on Earth

Cons:

-Doesn't work for most of the witches in the Hard Rain campaign (Minor detail, but I was hoping to hear the themes more often in this campaign)

Conclusion:

This will remain as my witch music for a very long time.
This + Manix33's Alexia Ashford skin = nightmares...
I am certainly going to be startling her a lot more than I used to ;D