hair system: full cap vs partial unit

[tylerbose]

everything is in the title.
i never used either. but from what if read on the web, full cap seem to be more practical.

no need to go to a hair clinic every month to cut your hair, just shave it off yourself, and you don't have to worry about color mismatch that may happen when your system start to get old.

but how detectable is it ?.

i'd like to hear from your experiences and opinions.

thanks.