I have bought many of these guitar leads from Thomann and couldn't be happier with them. I use them all the time when practising at home, which is a lot. Usually with guitars but also with my keyboard and there's no noise, hissing sounds, etc.
Pros: They definitely do the job they're intended for, and so much so I have ordered them multiple of times and ever one has worked perfectly.
Cons: Not a lot of negatives to add except maybe They're not as strong as the more expensive ones but if you take care of them, tidy them away after use, etc they'll last years.
I have no problem recommending these whatsoever. For their price, you can't go wrong.