Black Sun is nothing more than a flanker of Laguna Homme for me. I owned Laguna Homme two or three times. I used it often and enjoyed it. Nothing special, a nice everyday scent for the warmer days. Not too strong, fruity, slightly sweet. It has been a few years, but I still immediately recognized the resemblance.
It’s really strange. Although you can hardly see any similarity based on the fragrance pyramid, it smells almost exactly the same, except for a slightly woody/licorice note. They must have had a few barrels of L.H. left over at the "House of Dali" ;-)
All in all: A scent that you will surely get to sniff very rarely. More of a typical bargain table representative. That shouldn't mean that it's bad.