I have no knowledge of this knife line. It looks to be mass produced. If I had to guess, I'd say made in China. To a price. Probably an even cheaper price than it's advertised for.
There are a few things that would make me cautious:
1) Cheap mass produced knives tend to have sub-standard heat treatments. This affects sharpening and edge retention.
2) The grind (cross-sectional shape of the blade) is often not great, so performance in food suffers.
3) The profile (shape as viewed from the side) is not to my liking- far too much belly/curve to the edge.
4) The "promises" made in the advert are vague and unenforceable. Basically marketing rubbish.
5) Except for steak knives, I'd advise against buying knives in a set. Buy the knives you want to use. For most people, this will be a chef's knife. Possibly also a bread knife, slicer, a utility or a parer. Or a cleaver if you like. There is little point buying a chef's knife and a Santoku in a set. These two profiles do the same tasks. Instead of buying a set, buy a knife or two that you will use all the time.
Having said all that, it's worth pointing out that KKF tends to focus on higher quality knives than these. If you are interested in recommendations for a single entry level quality chef's knife, let us know. However if you are interested in the cheapest knife set that you can buy, you may be asking in the wrong part if the internet.