My experience with W.E. at their Chandler location was a trial to say the least, BUT all was made right in the end. I will leave out the gory details but say that I got two treatments (with a Groupon) that left my middle-aged teeth very much lighter. They don't blind you, but they are several shades lighter than before. Warning to individuals with sensitive teeth: my teeth are sensitive, so I anticipated this. My teeth ached for the next day so beware. Skyler, the owner, is eager to please so don't be afraid to ask to speak to him if you have any qualms. With the Groupon, it's a good value.