I and my mostly friends used iphone lIke 5s, and 6s.And I m use iphone 6s super quality and amazing sound quality. I love iphone 6s HD screen and full hd 3d screen .And with a nice battery backup easily or fast charging. I m happy to bye my iphone 6s. The good compared to iphone6, it improved speed everywhere with new processor faster wireless quicker Touch ID sensor.iPhone 6s very good phone with front and rear camera and a bold new 3d touch pressure sensitive display which offers new iOS shortcuts.