Nope, never tried it ... yet. It is a curiosity and supposed to be a trendy garnish among the foodie/gourmet crowd. And I like the look of the sprawling, spiny bush.
Currently, I have Meyer Lemon, Key Lime, Kishu Mandarin and a Trifoliate Orange (which used to be a grafted Kumquat before the top died). I like citrus and they seem to do fine here, if I bring them inside over winter. Grapefruit and Blood Orange are on my radar, but the true wishlist ones are Finger Lime and the Sicilian Lemon, particularly the Santa Teresa Feminello variety.