I don't know about expert opinion LOL! but I have been drinking ( Herbal )teas for a year and a half and they have excellent health benefits! With the Candida diet in effect I found myself wanting more than just water to drink so I started to experiment with Herbal teas...I've tried...Pau D'Arco..a bit.bitter but has great therapeutic effects especially Candida. Then There's Yerba Mate, camomille,Green tea, and then on the lighter side I Love the Cranberry Apple, blackberry, and Lemon lift!! The list is endless! for sore throats...constipation....tummy mint...
Like you said it's relaxing ! Enjoy! Explore! Experiment!
Just look them up on the net you'll be surprised what they can offer you!!