Remember that squirrel hair is very limp with not much spring. Squirrel hair is not going to perform well on any tests like zigzap strokes that need spring. The point on a squirrel hair brush is not going to be as fine as a nylon or a sable watercolor brush.
What squirrel hair does give you is a fabulous hit and miss effect on rough and cold press watercolor paper. It glides over the depressions in the paper, just hitting the high spots, depending on how much pressure you put on the brush.
If you want a textured hit and miss watercolor wash, squirrel hair is exactly what you need!I like this brush a lot. It's a good workhorse brush.
Blick Art does not supply the manufacturer's name of this brush. However, I've noticed it's remarkably similar to my Escoda squirrel round brush with the same red handle and same feel. Of course, this doesn't mean Escoda is the manufacturer, just the brushes are similar. Since they have similar price points it really doesn't matter.