the sssnake SPP8030

This snake is perfectly fine for permanent install. I have several connecting my studio racks and there is no unpleasant interference or unwanted noise on the line. I live in an area that can be prone to airborne RF interference but these balanced snakes have proved themselves to be resistant enough.
As far as build quality is concerned I wouldn't recommend these for live/pa use or for anything that needs regular plugging in and out. I would go for something a little more rugged if you're gonna be de-rigging and throwing them into a cable trunk at the end of every evening.
Pros: Cheap, good for keeping the back of the rack tidy.
Cons: Sealed jacks that cannot be repaired.

I own several of these and have had no issues so far. I use them to connect gear in my studio, so they mostly stay connected at all times.
They do feel a little cheap but I can't really complain at this price point.
I've had issues with the coloured rubber bands snapping off on more than one cable; seems little the rubber had dried up. Nothing a little glue couldn't fix though, and the cables are marked with (small) numbers as well so no risk of getting the cables mixed up it this happens.
I would have preferred if the colours were a bit different though; two cables are different shades of red, and two are black and dark grey respectively, which makes it hard to tell them apart in poorly lit conditions. The colour coding on the sssnake FSP cables are better, in my opinion.
Still, highly recommended!

A simple workhorse cable that gets the job done.

Pros: Obvious one, when you need to throw a bunch of middle/long length 8ch links to and from jacks specifically, then these are right on point, and helps limit the cable clutter.

Cons: Either my needs are too special, but I always feel the lack of shorter (and odd) length options. As in the tight situation, the extra cable bulk from multiple snakes can quickly become too much. So you get back to the same old dilemma: either soldering one yourself (costs extra time and money), using even more separate short patches (more clutter again, but of different type), or filling the already tight racks with unused snake loops. (Or lets be frank, going elsewhere for your snake fix).

Minor issue but still, some Quality Control slip up occurred back at the time I ordered those: one of the pieces I got had one of the Green color rings mixed up with Grey (so two Greys on one end).

But overall, I can't complain much really, they indeed do their main job fine.

I am a little bit disappointed with this product, It works well now but its got moulded plugs on the end of it... It will do the job for now but if ever something was to happen where I need to resolder a joint it means replacing the plug on the end of it...

I understand its cheaper to manufacture and better for the short term warranty... but seems silly for the quality not to be there where a user can service their own equipment for longevity...

Pros:
Does what it says on the tin... connects 8 stereo jack to jack equipment to each other.

Cons:
Moulded plugs, not user serviceable
No strain relief on the cable
Thin cables taking a lot of weight from the entirety of the loom

I bought myself some fine cable, and plenty of simple jacks, trying to make my own patch cables. I did my best to solder the things together as neat as I could, not having cable tester at the time, meant testing the cables in use. As I used these cables for backpanel connections in my rack to troubleshoot faulty ones was total waste of time. And the whole ordeal of making my own cables too. These Thomann's sssnakes are great. They work! And are cheaper then the sum of its parts if you try to make one yourself, not to mention time used to assemle something like this yourself. They have fixed jacks that don't seem to be made for replacement. Aesthetic quality of plastic casting on jacks is not top notch BUT THEY WORK! and are color coded. Once I plugged them in the back of my rack I didn't touch them, no need.
I haven't noticed any change in signal quality (surprise, surprise, its a freaking wire)
Cut the chase and get these if you need to connect your soundcard's I/O to your patchbay or mixer they are well worth the money.

I have several variants of these SSSnake multicore cables, both stereo/balanced and Mono/unbalanced. They do the work perfectly. I also have the XLR, and Y cable variants as well. In our space the length of these is perfect.

Using patchbays with a 24 channel mixer and an old 24 channel recorder, and add in the odd bit of outboard mic pres, fx etc, you'd be amased how much cables it takes to hook everything up. These snakes makes it easy. some good preperations and you can even keep a bunch of these snakes together and still keep it neat.

Unless you love soldering this is a good alternative.