Mine arrived today. Never owned any of the bumps before and I picked this one up for 2 reasons: Sounded like one hell of a good deal, and it has roughly the same lengths as the 561 I have preordered which will be the biggest folder I'll own and wanted some perspective.
Thoughts: Man these things are solid! Having never had a stud lock, I'm floored by how solidly they lock up. The handle is great, fits my hands well enough but not perfectly (I have pretty huge palms with stubby fingers so thats pretty common) The blade shape is fantastic, absolutely eats cardboard boxes.
Only one issue, the pocket clip. I'm ok with tip down only, only tapped for one side is kinda rough but still no big deal. My issue is that the clip is so flat it doesn't fit on any of my pants pockets well except for slacks. Debating clip mods, but in the mean time this thing is great if anyone is waiting for their's to come in, rest assured they're well worth the wait! Unbelievably good deal for this knife!