Works well, last long time
I've been using this product for years for my eyebrows.  I have a fair amount of greys and brows are coarser and sparse so I can't afford to pluck even one. This is easy to use, and does last a good 30 days for me.  As I got more and more greys I leave it on for the longer period of time as suggested in directions.  when I was just trying to darken my brows for a fuller look I always left on the regular amount of time.  Something like 4 minutes per brow.  I did try another type once when I ran out of this and it didn't last nearly as long.
Rating: 5 stars