I bought the Arete 45 and took it up to the Highlands a few weeks ago. I prefer packs that are quite minimalist with good practical features. The Arete is cheap and light and you can get it in black which is always good.
However, it doesn't ventilate your back very well and it can't be adjusted to fit you're back, I needed to lengthen it as I'm tall and wasn't able too.
Otherwise, build quality is good, I found it to be robust, quantity of pockets good and it was black. I'm now selling it on ebay having found a nice Vaude pack with better features.
(Written by: Michaelx105)