Yes the Lorann coffee flavor IS thick and dark. I'm just uncomfortable using it, but I figure I'm going to get one atty to dedicate to just the coffee flavor. I don't think it actually kills attys but it may indeed shorten their lives.
I have not had a lot of success when it comes to dark thick Lorann. Root Beer clogged to the point where I thought the atomizer was a goner. I ended up soaking the atomizer overnight and everything diluted out nicely.
Phew! Grape and Coffee also seem to be potential killers. What I find is you have to use almost half what you would for any other flavor, but you get a lighter taste you just have to live with. I also use 50% VG/PG as my mixing base.
I've moved on to Coffee from Dekang. No clogging issues. Tastes like a coffee bean. I use that as a base and build off of that. Safer that way. Too bad JC changed their flavors. Their Keona Coffee was wonderful.
I now judge Lorann flavors based on both ingredients and color. If it's too dark, I don't even bother.
--Prof Daffy