I had some very long MIDI cables in my studio to connect different units (synths, effect processors etc.) and needed shorter ones to clean up the cable jungle under my table. These seemed to be a very cost effective solution. I also considered the more expensive alternatives but as I just need these cables to make basically fixed connections I didn't see the advantage in paying more for otherwise higher quality MIDI cables.
The build quality of the cables is good, although the cables are a bit rigid and the end of the metal ring on the plugs is not perfectly even. It didn't cause any issues though, the connectors go smoothly into MIDI ports and the cables don't break (although I made quite some curves).
They are available in different sizes and colors which is great if you want to use some color coding or have your gear in different distances.
I would recommend these for everyday studio use, for this price you really can't go wrong. Although if you have a mobile rig I would consider more expensive cables with metal connectors and more flexible cables. Overall I'm very happy with my purchase.