The Triset, i have the ultralight 35 and the 35+8, i prefer the former.
Main nag for me is the side pockets on the 35+8, they're too small, (i like to stick my tent in a side pocket with the top secured under the packs lid, not possible with this) and not stretchy mesh either, the lid zip is of the wrap around type too, which some people hate as gear can fall out when you're rummaging for an item, personally i prefer it though.
The padding in the shoulder straps is also a little firmer than i'd like and can dig a little after a few hours.
Tough pack though, and i do use it over the ultralight when i need that little extra space for winter trips.
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