For the price, this is an outstanding MIDI cable. I've been unable to find a comparable cable around the same price point.
That said, this cable is better suited for studio or home use than for frequent performance or gigging. I have found over the years that these cables eventually fail when used in dynamic environments, with people stepping on them during performances and frequently being plugged/unplugged/rolled/unrolled.
When using them at home or in a studio, where they largely remain untouched, I think they are more than satisfactory.
Also, when they go bad there is essentially no way to repair them. The MIDI plugs at either end are fully encased in hard plastic and cannot be disassembled, repaired and reassembled.
Get a slightly more expensive MIDI cable with Neutrik or other high-quality connectors, and you will be able to repair or maintain them yourself as needed when they malfunction.
All in all, this is a very good MIDI cable that will work reliably for quite a long time. If you're frequently plugging/unplugging or rolling/unrolling it though, it will eventually fail. It might take a year or two, but it will eventually fail. Not as robust as more expensive alternatives, but well worth it given the low price.