Has anyone else tried OTC hearing aids? Did they work?

There's no harm, I don't think, in trying them. After an evaluation, prescribed hearing aids are tuned to the frequencies the patient is missing. OTC aids are essentially amplifiers and may not offer the results you are looking for. OTCs are new, however, and may be effective to restore some loss, but they wouldn't do much for someone with profound hearing loss.

All you can do is try them.