I have had three pairs of the Starkeys over the years (two analog, one digital) and the only problem I have had is disintegration of the silicone molds. Based on audiologist advice, I ordered the last pair with the hard plastic molds and they have been fine. Starkey makes a line of off-the-shelf attenuators and they manufacture custom products. All of mine have been custom molded by the audiologists and have provided good hearing protection with no artifacts that can't be attributed to poor fit. The first audiologist I used (around 1998) gave me a fit that allowed feedback through the mic when I turned my head or bent down to pick up birds or hulls. Fit from new audiologist is much better, no issues. None of mine has had a clear shell, so we may be talking about different products. The Magnum Ear covers the entire auditory canal, including part of the temporal bone to mitigate bone transmission. No whistling and no wind noise if the fit is right.
