I will never understand the hype around David's Tea. It's yet another (though better executed) brand of "tea" for the masses- AKA, a jumble of artificial flavours. But it "tastes so good for tea!" making it sell very well. The staff at several locations I've visited with my friend who's obsessed with the place didn't even seem to be educated on what they were selling.
To me, it's overpriced Crystal Light sold in a tea bag.