Most companies that sell hearing aids know that it might take some trial and error to get the best ones for you: the style, fit, and functionality all impact your experience. Fortunately, they usually give you a period from 30-60 days to get used to them, adjust their settings, and see if they are a good match. If not, you can get a refund. Just be sure to check the return policy of any hearing aid retailer you're considering prior to making your purchase.