Okay, I will admit that when I bought these, I wasn't too bothered about how good they were because I intended to replace them not long after... When they arrived I had to check that I hadn't bought something better/more expensive accidentally, the units are nicely weighted, they don't feel cheap in their construction, the housing is sturdy and feels as if it will last a while, and they have to be strong for me to use them and they last longer than one gig.
Most will assume that the low price may be sacrificing audio quality, however I haven't noticed anything in the way of a decline in my tone, in fact, I have actually had a slight improvement in my top end response because I used the connectors to replace some fairly long and poor quality patch leads that caused clutter on my pedalboard (which got cleaned up by the use of these mooer "C" connectors)
All in all, a good little pedalboard clutter preventing device that also reduces cable length used in pedalboards (which can affect tone).