Sure, it may not be "the best" when it comes to Hawaiian BBQ, but here's why I love L & L when I'm in Vegas:
This place is a perfect escape from the overpriced, overdone, overhyped joints that plague the Vegas strip. It's worth the very short drive off-strip to tuck into a big styrofoam container of rice, meat and mac salad. There are no frills and no pretense. At the same time, it's not as common as the McDonald's or other fast food that might serve as a break from the high-end fare in most hotels.
Most touristy places in Vegas that should serve food for budget prices usually don't. A hot dog anywhere near the strip can easily be dressed up to a $15 meal if you're not careful. There's no fear of that happening at L & L, though. The prices are always reasonable for huge portions.
Kahlua pork and the mixed grill were winners on my last visit. Looking forward to next time.