Here's a great way to carry two cables easily. I have 2 smartphones (i.e. iPhone 5 and Nexus) which uses different connectors and cables. Thus, this cable helps me to charge both devices at the same time.
The cables is slightly short. Hoping it can be slightly longer for better usage. Although it charges both iphone and nexus, it does not recognize nexus 4 in USB debugging mode (cannot see the contents of nexus 4) However, it does sync and charge the iphone 5.
Longer length would be great!
But I would still recommend for anyone who wants to carry less cables.