They have a nice online "wire maker" for ordering too (or did in 2017 anyway). I normally make my own, but I was with a buddy RV-ing far from home and he needed new cables, so we ordered from GenuineDealz.
I liked how easy it was to design the cables on their ordering page. Length, wire color, ring size, and even heat shrink color.
I missed being able to turn the lugs to varying angles to suit the situation, which I can do at home, but other than that it was great (and you don't always need that).