Joe,I've never tried one, but I'm guessing they play nicely. The problem I've found with making Marine Bands really air tight is that they sound and play great for a while, but that airtightness also means more stress on the reeds so they tend to wear out much quicker.
If the price is not an issue, you should try a couple and see for yourself (one is never a good test -- I typically test new harmonicas with a few in the key of "C"). Keep in mind, the density of the comb material determines the tone, so usually metal combs are a bit brighter that plastic or wood combs. I like metal combs for low keys like "G"s and wood combs for higher keys like "F"s to warm them up a bit.
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Play on,
Dave Gage
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