I finished another pair of striped socks with afterthought heels. (please forgive the too-small sock blockers)
See how the pattern is not interrupted on the stripes on the instep? That's the main reason I use this heel. It is somewhat fiddly picking up the heel stitches to knit the heel so I still prefer a heel flap or short-row heel.
I had to reknit the heel of the second sock about 7 times to get it to match the first one.
I just have this 'thing' about identical twin socks.