Opinions of Coincident CST interconnect?

Yes they are!... Compared to the "top considered brands", they are generally better. I have had my entire entire system fitted with them. One of the best kept secrets in affordable interconnects and speaker cables..
Audiojudge

A great value and I had to spend considerably more money to better them. Patience will be req'd as they do take alot of time to break in...

I'm using Coincident CST interconnects, and I am very pleased with them, especially given their moderate cost. However, I didn't and don't find them to be a particularly amazing product. On the other hand, the Coincident Reference speaker cables . . .

They need a very long time to do the break-in thing, like 2 or 3 months. I've found interconnects to not make all that much difference in a system due to the low level signal that they are passing. However the CST's DO make a difference. Give these a long time to do their thing. Then one day you will notice that for the past couple weeks the music has been sounding better.
Anyway, that's been my experience.