The product is working as expected but the experience is not for me. In the instruction, it says to use size M if not sure but it didn't fit my eyes at all. I spent a week looking horrible not to relax my lashes too soon again. Then, I tried size L, and even that was too much. I ended up relaxing and straightening eyelashes with fingers for them to look alright. Can't wait to grow new ones, will not do that again. Having solution packets of different color would be a user experience enhancement.