Tedfroop
One eyed and left handed
Its nice, I will say I wish they'd used a carabiner setup instead of the double overlap velcro. Its sturdy as heck on my bag, but for the price of a rangefinder (even a more affordable one like this) I want to never ever think twice about how its attached to the bag.
I have lenses that attach to my camera bag by the same method and if the sturdiness of their attachment is any indication you should have no worries unless you move the case from bag to bag hundreds of times. Apart from that maybe a stop by a sporting goods place to pick up a large carabiner that the strap fit through would mean you only have to undo it once.