i used it for the first time yesterday. just got it in the mail along with spectral dnc-n.
it goes on really clean, like putting on water. i think it made my scalp itch though. i put it on 10 minutes after applying spectral dnc. don't know if the itch was caused by the combination of the two or if it was just the spectral f7. been using dnc before with no itch problems.
in the evening, i applied spectral dnc-n to my scalp and spectral dnc-l to the hairline. the dnc-n leaves my hair really greasy.. takes longer to dry than the dnc-l. mind you, i think i have the older formula of dnc-l..