MY EXPERIENCE:
I have bought more expensive cables in the past and I have also soldered my own. But for patch cables for my pedal board, these just make much more sense.
I have bought a handful of these (and some of the equivalent longer ones) and If I ever need some again, I will buy the same.
SIZE:
My favorite thing about them is that they are small. I don't have much space left on my pedal board, so I need do save as much space as possible, and I can do that with these.
QUALITY:
They also feel pretty well made for such inexpensive cables.
None has broken on me so far, but if they do break at some point, I will just replace them, because they are so cheap... (I have a couple of extras in my gig bag, just in case).
SOUND:
They don't produce any noise, and that is good enough for me.
If any cable snob wants to tell me that any cheap cable makes the sound worse, you should really go outside and touch some grass. Your pedals probably alter the sound much more than a cables. Seriously, there is no such thing as a cable that sounds bad. You will not hear any difference between these and any "high quality cable". As long as there is no hum, there is no problem. But IF you really insist, there are similar cables to these with a golden connector, just go buy those and leave us normal cable enjoyers alone.
PROS:
-cheap
-small
-do the job
CONS:
-none so far, if I do encounter something I don't like about these, I will be sure to come back here and edit this comment.