Size, Performance, Durability, Customer Service, Value.
Size: The AAA is tiny! You think it's small in photos? Wait until you own one (And you will own one).
Performance: This is related directly to size. The AAA and the LS are 2 of the best flashlights when it comes to size vs. performance. There are brighter lights out there but they're also much larger.
Durability: The AAA is nearly indestructable. It's been frozen solid, dropped, kicked, ran over, flushed, you name it. It keeps on a shining.
Customer Service: Peter has got to be one of the best people to deal with out there. Period. End of story.
Value: They're expensive but they're worth it. To me that's value.