Started using Latisse last week of January.
First week mild redness in eyes that disappeared the following week. 2nd week threw out the applicators and started using a fine eyeliner brush. Note the biggest con about this product is only the applicators provided by Allergan. They are in my opinion, akin to using a scratchy paintbrush on your eyes and causes product loss. 3rd week starting to notice eyelash growth ie tiny eyelashes sprouting and existing lashes growing longer. Skip to 4th week and I can retire my eyelash curler since my outer lashes have gotten longer and have a beautiful upward curl.
Biggest Pro: It works. Very easy to use as I apply early in the morning, flip the Latisse cap over put a drop or two in the cap and carefully apply along my lash line with my eyeliner brush. Clean off my brush. That takes 2 minutes in the morning so it's not alot of work.
Biggest con: The Applicators which I don't recommend unless you want to waste a very expensive product. I also found the applicators caused more run-off into my eyes that first week of use. The product lasts longer when you have better control with a high-end eyeliner brush. So for me, the applicators go in the garbage!
My reply to any fears of contamination by reusing an eyeliner brush is well everyday I use black eyeliner, black mascara and eyeshadow. Hello ladies, we are not cleaning those brushs everyday so since I wasn't born yesterday I will keep my eyeliner brush and save on product loss.