IP rating is IMHO critical. If people start relying on it to live their life, getting it killed by unpredicted rain or an accidental water splash will be quite a shock.
Battery life could be worked around if they're really that much of an improvement in day to day use. Even buying two or three pairs to go through a full day could be a worthy tradeoff if they don't need to pair to anything. Cost could be an issue, but 2 or 3 of them would still be cheaper that many hearing aids for instance.
Battery life could be worked around if they're really that much of an improvement in day to day use. Even buying two or three pairs to go through a full day could be a worthy tradeoff if they don't need to pair to anything. Cost could be an issue, but 2 or 3 of them would still be cheaper that many hearing aids for instance.