According to my experience, these disconnects have been very helpful in streamlining my wiring process. The insulation is of high quality and prevents any mishap from happening..
Pros
Reliable and efficient for industrial and scientific purposes.
Cons
It would be great if the package came with more connectors in it.
I finally paid money for quality connectors instead of cheap ones. Doesn't matter. I removed the plastic cover and slid it down the wire, crimping one side at a time with needle nose pliers. The hold is excellent! I replaced the plastic and looks like a professional job.