Is optical image stabilization worth it for me to get an IPHONE 6S PLUS instead of a IPHONE 6S?

Is optical image stabilization worth it for me to get an IPHONE 6S PLUS instead of a IPHONE 6S? - 1

It depends how much video you want to shoot with your phone.

NO, It isn't. Optical Image Stabilization does not affect the camera of a phone that much until and unless your main priority is shooting videos. You should only consider buying a iPhone 6s Plus if you want a bigger display and larger battery otherwise you should go for a iPhone 6s

It would help in getting clearer shots & more stable video. If you value that then yes it would be.