When the first lineup (Carolina Tangy, Texas, Memphis & Kansas City) came out last Summer, I tried them. The Carolina and KC are very good, the Texas is fairly good, but the Memphis is (IMO) too sweet. That being said, most of my friends & family really liked the Memphis, one commenting that it was "better than the sauce Chili's uses."
I have not tried any of the new ones for this year, but I'd like to try them. As an aside, the King's Hawaiian sauces (aside from the "Habanero Lava", I think?) are all pretty tasty and unique.