As a Physical Therapist, I used to help patients with custom-fabricated orthotics. This is still helpful in some cases, but most often my patients (and some family members) just have flat feet (pronation) and they develop pain in the feet / ankles / knees / hips / or back because of the mal-alignment.
I did a lot of research into "pre-fabricated" orthotics, and was very pleased when I found ProTalus. Their team of professionals behind the design of the insert gave me initial confidence in the product. It was also only a FRACTION of the cost of custom orthotics, making the technology available to essentially everyone!
I have tried them with several patients and have been extremely satisfied with the outcome! Also, the whole organization seems to be highly customer service oriented. I am very pleased to have found this little gem of a product and the company.