This is as basic as a tea gets. Rooibos is technically a tisane or more commonly a herbal tea. It comes from a plant called Aspalathus linearis and simply referred to as red bush. The plant starts out as green and the “red” color emerges as a result of the oxidation that occurs during the processing of the leaves.
Rooibos has no caffeine as well as other chemicals that occur in tea (sourced from Camillia sinensis); these differences result in rooibos being very forgiving in the brewing process. You could easily oversteep leaves from Camillia sinenses and the resulting liquor is bitter, harsh and undrinkable, but oversteeping leaves from Aspalathus linearis does fall into that problem.
As a experiment, this rooibos was steeped for 8 minutes, with water that was boiling at the start. The tea that resulted tasted fine, it was strong on the typical smoky flavor but there was no bitterness.
Under a standard brewing of 2 minutes 30 seconds, it resulted in a refreshing tea that had a hint of smokiness to it and generally a smooth finish. There is a very, very slight nutty flavor to it that complements the mild plant-like taste- however, these two flavors are very mild, which is good for something like this that makes an excellent everyday drinker.