Anyone use an F Stop Rucksac?

Having recently bought a Lowepro Primus AW rucksac I thought I'd found the ideal hiking/camera gear combo but unfortunately I was wrong - it's just far too uncomfortable on a days hike, the strap system is poor.

I've been considering the F Stop Loka as it seems to have been very well designed and the strap system looks to be similiar to my regular rucksac, Osprey Atmos, which is excellent. Does anyone use one and can pass on their thoughts?

thanks

Simon

I've seen excellent reviews on a ski forum I visit - these come from professional photogs who seem pretty demanding users.

How are you planning to buy? The downside seems to be actually getting them from the company - seem to be recurring stock/delivery issues - but if you know somewhere which has stock, that won't be an issue.