ive used Toppik/Xfusion and Caboki and at least for me, neither of them work well with my hairline exposed (heavy diffuse thinning in nw6 pattern but only like NW1.5/2 hairline). I have to comb my hair forward over my hairline to make concealers work, looks boring as f*ck. Kinda sucks not being able to have a hairstyle at all but sucks less than looking bald