I had a bad experience here and only brought my rating up to 3 stars because they were happy to do whatever it takes to attempt to fix it.
I've dyed my hair myself for years with no issues. I had never gotten my hair professionally dyed before, and asked for their recommendation on an all-over color in order to get my hair to a lighter blonde (i'm naturally medium blonde). The stylist insisted on a bleach and tone. Now, i'm not sure if she did it wrong, or i just didn't know what to expect, but it took about 3 hours and turned out yellow. I've never had this problem with box dyes before. I asked them the next day (after i decided i couldn't live with it) to attempt to fix it or for a refund, and they re-dyed it for free. It still wasn't quite better, but what was worse was the damage it did to my hair. My hair started breaking off in the shower in the next couple days and i had to pin my too-short bangs back for months afterwards. Needless to say, i will only be using box dye from now on.
I'm happy they were willing to reconcile the issue, but disappointed in the quality of work/knowledge of the employees.