I had, in the past, used GROUPON many times, sometimes the voucher would expire and I was just stuck, my bad. This time I purchased one for a beauty school, two of my friends did also. The first one to "try" it left with green hair, they couldn't get the color out, btw, she wanted blonde hair not green. The 2nd one had clumps of hair fall out while she was in the chair, they left a solution on too long. When I contacted Customer Support to request a "credit", not a refund, the reply was, "It can't be bad all the time, just try it" I guess I'm weird, I happen to like my hair and want to keep it! If you have no Customer Support from them, write about it, so they get it. I've unsubscribed and so have my two bald and green haired friends!