Not smoked any yet, but can say they are good at mould resistance
I started an outside grow way too early in my lat. the second month was constant rain and my greenhouse has been flooded, lost all my russian rocket fuel's to mould but the CM's are still doing fine, no mould at all
Just to add, i've also lost tomato plants and cucumber plants due to what I think is stem rot, so these girls are pretty resistant to damp conditions