I use the heli pro for carrying my laptop to university, it's a good bag, but yeah not so good if you've just got back from the mountain and it's damp/filled with empty beer cans and snack wrappers, but I suppose it doesn't take long to clean out and dry off.
I have the kingston one, never had any rasta comments, would probably just say I like the colours/love to blaze 420 fuck off about my bag.