Hello Partial .... Knot visibility has never really been an issue for me ....you can get away with murder with that particular style...it ensures that any possible flaws are not seen..... I do find that the main area of concern for me , once thinning sets in is that very ` visible` area just at the top of the ear flaps there where it`s sitting against the side of the forehead....the hairs begin to thin and also come free of the lace as the lace begins to fray a bit ....that can lead to tape-shine being visible too, especially in sunlight.... I think the bit if gray hair also helps give the impression that the hair is ``all mine`` .... I have two new systems here unstyled ...density is a bit on the high side .... I`ve only managed to get around to cutting off the excess lace for now ... my stylist is away on vacation for a while too ..there`s another one who`s been recommended to me a bit further from where I live .. I might see if I can arrange a styling there and see how it turns out ...obviously I`ll post the usual ` before / after` photos when I sort it out ! Cheers for the interest !