That is an injected thinskin unit, so there are no knots. You can see the edge of the 'skin' base in several places if you look carefully. The hairs have been injected in a very mechanical pattern, which doesn't look natural, and each hair is looped at the base, rather than being injected separately. So not a good look, and there are certainly much better pieces available. Personally I don't think skin bases are suitable for an exposed hairline style like this; you need lace.
However, the real problem with this guy's photos is that he is far too bald for this hairpiece. There has to be a balance between where your (artificial) hairline is positioned and the degree of recession in your side hair, otherwise the hairpiece looks like an omelette sitting on your head, as this one does. To some extent you can mitigate receding temples and sides by adding flaps onto your hairpiece, but after a certain point that ceases to look natural, and then you need a full wig. That is the situation with this guy. A standard hairpiece would never work for him, no matter how "high end" it was.