Roland UM-One MkII

It's a top quality MIDI-USB interface, well build and simple to set up: I simply put the CD it came with in my PC (Windows 10) and run the driver installation program.
Then I connected my piano (Korg D1) and it worked flawlessly without any noticeable latency problem.
The only negative aspect is the price, as this cost as much as two of the cheaper models.
Still, I gather that the reason of the pricetag is due to a proprietary tecnology being used by Roland to reduce latency, so if you want the best, this is the way to go.

I got this cable to hook my foot midi controller to my pc and have the ability to control some plugins on my DAW on the fly. It is very straightforward to hook up, once you installed the drivers, my DAW immediately identified the cable as a MIDI input. After that, all that was left to do was some configuring on which MIDI messages to send and what to do with them on the plugin side.
Latency is pretty good as well.