I'm using this cable from my digitakt directly to my iPhone 6 and it works great! (Make sure overbridge is off on digitakt and usb midi is on). Good length, perfect fit. Cant comment on durability since I just got it. A perfect example is running korg gadget. I can run 8 different synths and drum machines in there with midi cc and each on a seperate channel and program the whole thing from digitakt in my case. The limit is pretty much that of your phone cpu and the device sending the midi, and of course 16 midi channels. For the price of the cable it's a huge way to expand a portable setup.