It's in your best interest-and your service provider's-to speak up when you don't like a result. You don't have to be an asshole about it, but you should get something you like in exchange for your money.

• Professional or expert who cares about their craft want feedback...

• Don't fly into a rage or be demanding.
• Remember everyone is human and the professionals offering you services are trying, even if they happen to fall short
• Take your complaint up with the person responsible, whether it's a cosmetic practitioner, chef, or other involved profes...