Have a sample of this; seems unique to flavor a Darjeeling, but I think its a cool idea. (At least, I haven’t seen many flavored Darjeelings).
The lemon is a very pleasant, noticeable addition. I didn’t taste caramel, but I think it sweetened/enhanced the lemon flavor. This almost smells like Earl Grey, but tastes nothing like it. There is nothing floral, perfumey, or bitter in the tea, just a smooth lemonyness. (Is that even a word?) I find it a bit hard to give a rating, but I think it’s not quite as good as their straight up DJ blend.