Do I need upgraded power cables?

I admit it is awfully impressive for any company to make a power cable that looks this good for under $80, but use some common sense. 

Just the knock-off connectors are look alike Furutech FI-50 connectors which retail for several hundred dollars- each. It is not possible this cable uses any sort of quality, I guarantee they don’t use red copper, it is not 99.998 % pure, and the carbon fibre is plastic. The website pictures aren’t even real pictures. Pure lies and deception. 

Preffair = Chinese knock off. I don’t know why anyone would support this. 

Why Preffair? Under $40. with free shipping...that is why......and I have built power cables costing more in parts, and my time, that do not do anything better than these. Never have I indicated that they are "real", but at the price, they are FAR and AWAY better, in SQ, than the standard cables that might come with the components. Always, a return is allowed as well...nothing to lose. 

@bzawa Best value for rigs that aren't crazy expensive, Puritan Audio PSM156. It comes with a very good power cable or can be upgraded to one with a crazy expensive power cable. The original is still very good for a supplied cable. 

Two hours into a Saturn power conditioner with an M101 power cord.

So far so good. 

"Do I need upgraded power cables?"
Only if your current cord is broken or the wrong size...or if you want a nicer looking cable.
For sound improvements?...NOPE