It does gunk up
coils, but not as quickly as Bobas Bounty. I vape maybe 10ml a day and I end up changing wicks and doing a dry burn every 48 hours or so when I notice the flavor start to go.
As for flavor, it's Clark's own vanilla extract,
tobacco absolute, and Clark's own
tobacco extract. Everyone gets different flavors from it. I get vanilla, tobacco, coffee at times, like a capachino, sometimes chocolate and nuts like a snickers bar, bakery cinnamon, etc. it's slightly sweet, but not as sweet as Bobbas. It changes almost daily as it steeps. If you like tobacco juices you'll love it. I thought I hates tobacco juices until I tried it. Turns out I just hadn't had any good ones yet.