I have the 45 litre version of this.
There's certainly plenty of room inside although I find the back system eats up a little too much space when packing.
The larger size is ideal for Winter walking and I can carry all the usual gear plus extra Winter kit with no problem.
Unlike my Berghaus Freeflow, the back system comprises of a metal frame which can restrict movement when wearing a full pack.
Having said that, I find this a little more balanced and stable when full compared to some other packs I have used.
As the review above says, it could do with compression straps. I also think it needs better (and extra) pole/ice axe attachments. The current ones aren't stable enough and my poles/ice axe swing about a little too much.
I'm giving it 4 out of 5 for value as I picked it up in a sale at half price, otherwise it's a bit overpriced.
(Written by: Wilko)