My wife and I started to drink Oolong GABA green tea for a few years now as an afternoon habit. We both enjoy it. No caffeine, but γ-Aminobutyric acid which ought to be healthy. However, we drink it mostly to take a break and enjoy the taste. Compared to black teas this tea isn‘t strong in taste but rich in flavour regardless. For me personally it made my tasting sense become more sensitive and appreciative over small nuances in flavour.