Hi Georged193, you should reach out to “abarsanti” who is a member on this forum who purchased OPNs from BuyHear.com and got to keep the wireless FittingLink 3.0 programming module for an extended amount of time (several months?) so he should be able to give you his perspective on how easy the fitting software is because he had it for a long time and might have spent a lot of time fiddling with it himself. I think this model is probably the best compromise where you won’t have to shell out $ to program the HA yourself, but you get to keep the programming device for an extended amount of time to fiddle around with to your heart’s content before you have to return it. Usually once you’ve found the sweet spot for your programming I would think that you wouldn’t need to fiddle around much with it afterward.
As for the moisture resistance, the OPN has an IP68 rating which is the highest rating for dust and moisture resistance available that I can tell. But I’ve still been told not to take a shower or go swimming with it, just OK for workout/sweating and the like. A cheap digital watch is fully enclosed so more easily sealed, compared to a hearing aid with battery door and microphone and the receiver are open somewhat although probably nanocoated. So I can understand how it’d be much easier to make a cheap digital watch to be more moisture resistance than to make an HA moisture resistance.