Long Trail Runs
Excellent pack for long trail runs. Somehow, it doesn't bounce too much, but that obviously gets worse if you put a lot of weight in it. It has just enough capacity for along run in the mountains. It can hold plenty of bars, a 1L Platypus Hoser reservoir, a rain jacket, a UL windbreaker, and a mini first aid kit.
The only negative about this pack is that it has a very short torso, so if you have a long torso this probably won't work for you. I generally use a "medium" in packs and the Diablo is barely big enough for me.