I have used them and have nothing but good to say about them. DS11's prescription changed and I had ordered 2 years worth of contacts, they took them all back, credited me for them and sent out two more years of the new ones. If you buy 8 boxes shipping is free and you get some nice discounts and with their simple return program, why not. They mail you the new contacts and include a postage paid label to send back the old contacts right in the same box. The hardest part was driving to the post office to drop them off.