This is really a must buy for an iPhone owner who likes to listen high quality music on iPhone. I am using it with my iPhone 7 Plus and the sound quality it improves will surely blow your mind. I know it is not that good like Chord Mojo and I am also owner of Mojo too but on the go it is very hard to manage it when DF Black will give you full flexibility because of it's compactness and it is really very pocket friendly in terms of pricing. Go for it.
 
I also uploaded a small unboxing video on youtube. You can watch it here:
 
https://youtu.be/jLGpTH6vkdM
 
Thanks...