It's pretty meh, a guaranteed 5*. Not worth.
A new function has been added which allows you to equip an extra ability to all your girls. I'm not sure how you can unlock the abilites but so far I only have 20% attack up one which I have equipped to all my girls.
You can find the ability screen by clicking on this button on the character screen.
edit: Just found out how you get them. They all require different currency such as whaleship medals, affection crystals etc etc.