Bests & Worsts Reviews from Amazon

I purchased 3 of these cables in an attempt to get some of my devices wired for ethernet and to setup as a wired backhaul for my 3 wireless access points. In testing, I plug a random Cat 5e or Cat 6 cable right from my laptop into my router directly and can roughly max out my gigabit fiber connection. On All three of these cables, my speed immediately drops to about 70-75% of that (700-750 Mbps from 1,000 Mbps). I don't know where all the good reviews are coming from, perhaps they're people who aren't trying to achieve gigabit throughput but I guess these aren't the cables for me.