Appear to be very adequate and well made with nice connectors and sleeving. The braided sleeving might be a concern for tight spots. You need to slow down a bit when pulling through tight holes in dash etc. However it appears to adequately protect the cables nicely, similar to techflex.
One I would make a suggestion, is the cables were tightly bent in the roll at packaging, so they like to roll up on themselves into a loop (think garden hose kink) when moving them around. I'd suggest a looser roll for packaging.
I hadn't yet, but will check their resistance to verify good continuity. Yeah I guess I should have done this first before install.
I actually color taped the end connectors, as the slight color variation of the twisted wires are a bit difficult to discern in less-than great lighting in the garage even with a hanging work light. Easy enough mod to make sure the connections are right.
Very impressed so far in the NVX branded products.