In Spanish there is a structure that is used to talk about something/someone's quality. This specific structure somehow highlights that quality. For this we use:
Ser + de + un/una + [noun+ adjective]
It is generally used with certain adjectives that are either very positive or very negative. Have a look at the following examples:
This structure is not common in colloquial Spanish; it is more formal and slightly more poetic.
If we wanted to convey the same meaning in a more colloquial way, we would simply have said:
"Estos productos tienen un sabor exquisito."
"La maquinaria tiene una categoría superior."
"Esa cantante tiene un talento extraordinario."
"Su vestimenta era muy vulgar."