The Guardian gives you a pretty good picture of life in a city under ISIS:
Isis units recently staged a show of force in Derna, with 60 jeeps packed with black-clad fighters parading around the town.
Their leader, or emir, is Saudi preacher Abu al-Baraa el-Azdi, who arrived from abroad in September. Backing him up are two to three hundred fighters....Under their control, Derna is being cleared of opponents, with a string of assassinations of judges, government officials and activists.
In November the severed heads of three young activists were discovered in the town. El Azdi has set himself up as Derna’s supreme judge in the requisitioned courthouse, dispensing executions and floggings.
ISIS' a photo montage of life under ISIS in Anbar portrays quite a different scene. Also, notice the almost total absence of woman in town.
There is more than one side to ISIS. There's the fighting side which it how it intends to win the region. And then there's the charity-giving, job-offering, street building, gentle with kittens ISIS, that goes around town explaining that no one has anything to fear from them so long as they follow the rules and do what they are told.
John Kerry has started interpersing the word Da'ash into his speeches. That will make ISIS angry. Only enemies f ISIS call it Da'ash. It considers the word an insult.