I have had hearing aids for 15 years and have experienced all of the above mentioned problems, cost vs quality and service. I get mine from the VA but the brands are similar to those mentioned..In my experience background noise is the major factor leading to frustration with the hearing aids.
Everything including wind noise will interrupt the quality of reception. Please work with her to explain some of the issues you have read here.
Also, if possible get the ones that are rechargeable and have a self contained battery
