Hi,
For me personally would be differences between units,when you are using same specs,but i have learned how to deal with that,it would not be noticable to the public,and i guess even natural hair doesn't look the same all the time,and these units are hand made by different people.

Taking off and cleaning unit,and replacing with my second unit every week.

Strong wind,which will mess up my style,so i use hairspray to hold it in place.

These items above can be worked around,and when i take off the unit and see this old face looking back at me,i know its worth the trouble,or im going out and notice how much better i look with hair.If you look good bald and have the right shaped head you are fortunate.

Regards topcat