Tea Sparrow gets teas from other creators, rather than mixing them themselves. So unlike other some boxes, you can order more of a tea you really enjoy because the brand's website is listed on the packaging.
One of the main benefits for me was getting to try expensive brands that I couldn't justify buying normally. You're basically getting trials of different teas. Tea blends vary in their price point, but sometimes you get some really expensive ones in there. I found a really wonderful, special tea that I would have never tried otherwise because of the price.
The price seems to have gone up since I was subscribed, but I still think it's worth the cost. I only stopped subscribing because there was often a tea with mint in it and I'm allergic.