Pros:
-"Indestructible"
-Great Range of Light (2-100 Lumens)
-Lightweight
-Ease of Carry
Cons:
-Price (Most people won't pay almost $300 for a light)
-Battery Life (approx 50 minutes on high)
-Batteries are hard to come by. (www.newgraham.com sells them)

Overall:
Currently my EDC, highly recommended