they do exactly what they are supposed to do, top quality connectors on a decent cable, 9 metres is a suprisingly useful length as will reach for most situations on stage so much better than a 6 metre, and come with a useful cable tie courtesy of Thomann, i have lots of these and over a few years of professional use have not had one fail, not many cables on the market you can say that about !, the cable is quite stiff so lay it out properly , it doesn't show any memory curls or kinks, so is flexible enough a good balance achieved here. i think treated well they should last as well as any so called top brand cable, they dont exhibit any noise problems and as mentioned the connectors are top quality, do yourself a favour and get these very decent cables, be happy