Costco hearing aids are very good. They have 3 or 4 different sets/prices to pick from. I had a set of their Phonak Brio aids that lasted about 5 years. Costco also has the best prices on hearing aid batteries. They do a decent test first to check your level of hearing loss then they can tune the new hearing aids with their computer to give you the best sound possible. They also do free adjustments when you need them, and nowadays depending on the model you buy they can even remote in via blue tooth to make any changes. You don't even need to go to the store for it.
Costco has a very good hearing aid department. It is also worth a look at Lively hearing aids. When I needed a new set I found Lively to be about half the price of Kirkland/Phonak. With Lively you have to go online at
www.listenlively.com and do an online hearing test, then one of their audiologists will call you and go over the options with you to get the best results. They have 3 models, all cost a lot less than Costco or at other hearing aid centers/audiologists. After the tests and consultation they will program your hearing aids and ship them to you, then you have a follow up appointment by phone and bluetooth to be sure everything is working correctly. I got my new hearing aids in April this year, I got the best ones they have, price was about $2,000.00. I could have just paid cash but I opted for their 18 months same as cash zero percent financing. This was absolutely some of the very best money I ever spent. They also have a 100 day money back no questions asked guarantee.
I have been very happy with my Lively aids. They also have a phone app you can use to make your own adjustments and set up different listening profiles for various listening environments. Once I found the right settings it has been set and forget. My Lively aids also do not need batteries. They will go about 3 days on a single charge, 10-12 hours a day. It makes a huge difference in my quality of life to be able to hear better. It also helps me in my job and my marriage too. I told my wife when I first got hearing aids I felt like an illiterate person who finally learned to read. She is really happy we can communicate better and she is not repeating herself all the time.
The main thing with hearing aids is keep them dry. I don't wear mine if I will be out in the rain or even very humid days. Moisture is the main enemy of hearing aids. One other thing I would suggest is stay away from the cheap "amplifiers" on Amazon. Before I went with Lively I tried a set of $100.00 hearing amplifiers from Amazon and they were total garbage. One did not work at all straight out of the box and the other one just squealed super loud in my ear, no matter what volume I set it on.
No matter where you buy, when they test your ears try the best you can to give the most accurate responses to the test tones you will hear. That is critical to setting up your hearing aids for the best performance. I have "profound" hearing loss and it took 3 tests with Lively to dial mine in correctly. One last thing is give yourself time to get used to hearing aids. The best way to do that is spend a few hours reading a book or magazine out loud to yourself. You will be able to hear other people better right away with hearing aids but it may surprise you how your own voice sounds different, stronger and clearer with hearing aids.