I was a customer with them for 7 years. Since I was on a subscription-basis ordering, hair colors kept coming to me even though I wasn't coloring my hair every 7 weeks. In a nutshell, I noticed a bottle that was 4 months old that it was evident that things were growing in the bottle - BIG nasty things too! The bottle was always in my home on the counter, so it wasn't exposed to heat, cold or anything of the such. I sent pictures to them and they refuse to credit my account back. I cancelled by the way, but they will only offer a "free hair color for next time" - um, your stuff is growing in the bottle, I have NO interest on putting that on my hair. So long story short, when I pointed this out, "magically" their FAQ now includes that you must use within 6 months (yes, it was 6 months and 1 week when I finally got around to emailing them) BUT Google the "gold standard" across the board for hair colors, and you will find the "standard" is THREE YEARS - so I wouldn't recommend this company at all - not at all. Use another company for your hair color that actually care about their customers.