Ordered some of these connectors to make myself some low-profile patch connectors for my latest pedalboard. I wanted to minimise the distance between adjacent pedals and so these "pancake" style connectors seemed perfect.
First off, although these connectors are cheap they are very good quality. Solidly built, decent quality metal that is well cast and has no sharp edges.
Opening them up, they have two solder tabs, one for the signal and one for the shield. On some connectors the shield just gets soldered to bare metal so having a dedicated solder tab really helps make the job easier.
There is also a little plastic "guard" inside the connector that prevents the signal from earthing on the edge of the case. This is a nice touch and hopefully will prevent any cables from being intermittent!
I used Sommer Spirit XXL cable and made myself four cables. I'd never done this before but it was really very straightforward, took about ten minutes a cable so I'd imagine that with practice you could get a lot quicker. All of them worked first time (thanks to the easy two-tab design of these connectors) and they sound really good.
If you want the "too long, didn't read" version then: good connectors, well designed, easy to use, sound good.