I purchased from Genesis and found it to be a very pleasant and money saving experience. There is a 60 day money back guarantee and the name brand hearing aids that I received performed far superior to the ones that the local audi had provided.
I provided an audigram to Genesis and received their recommendation on open fit hearing aids. They mailed them, I put them on and never had to return them for adjustment. Genesis was helpful in the process. However, I figured that even it they had to be returned, the time mailing them back and have them returned was going to be much shorter than the two week waiting period that it took to get an appointment with the local audi, not to mention the gas and trip to the local audi. Postage is much cheaper. Likewise, any repair was going to be less expensive than the local audi who always had to send the aids to the company for repair too.
I do not think that mail order is for everyone, but for some of us, it works out much better and less expensive than a local audi.