Ours are both great, stock coils failed on both after 2 days, our fault.
The coils really need to be left for 10 mins and to be honest I over primed both too to make sure they had enough juice in them.
These cannot be dry burned so if you treat them as your would a cotton build that might work for you.
I've never dry burned them, left them for half an hour as advised on the instructions with them, even tried leaving for an hour, half a day, etc, etc still no different. I bought coils from 2 seperate vendors (both known and with good reputations on here and elsewhere - still no different). The nautilus seems to be a hit or miss device - i have read roughly equal amounts of glowing reviews and awful reviews.