According to both the bottle and Wikipedia, Valentina sauce is made in Guadalajara, Mexico, and comes in two varieties: hot and extra hot. The consistency is thicker than a Tabasco, but somewhat thinner than sriracha. The color is a wonderful brick red. The flavor is very bright and savory, and the heat is a pleasant, middle-of-the-tongue sort of burn. The ingredients of this hot sauce are few (and they happen to be vegan). They are: water, chili peppers, vinegar, salt, spices, and sodium benzoate (as preservative). The awesome red color is all-natural, imparted by the chili peppers and spices.
I first encountered this hot sauce at Richmond's coolest all-vegetarian coffee shop / hangout spot, Harrison Street Coffee Shop. Ever since, I have been able to find it at a local grocery chain, Kroger. But should that supply ever dry up, I rest easy knowing that Valentina is also available from plenty of sources online, including from various sellers on Amazon, a website called MexGrocer.com, and even on Ebay.