Ok, I'm not the best at write-ups so I'll keep this pretty simple.
Pros...
Perfectly centered blade that arrived sharp enough to leave a bald patch on my arm with one swipe. It's light, slim (completely linerless on one side but you really have to apply pressure to get the G10 to flex so I'm ok with the design), and the blade tucks away into the handle all making it very easy to carry despite being a mid sized (by my definition) folder. I put a drop of oil on the pivot, and it opens very slick and it locks up tight with no blade play in any direction whatsoever.
Cons...
Only two things stood out to me, one being the thumb stud took a little getting used to, as it nearly disappears into the G10 when closed and just stands out enough to allow for your thumb to catch it when you brush across the surface of the scale. I found that if I use the the first joint on my thumb and not the tip, it opens without any issues. Just took a little getting used to. If you like a slim discreet knife with clean lines, it's right up your alley.
Second issue, and this may not bother some of you, the G10 is very grippy. I'm talking Emerson grippy. I don't mind it so much, I have Emersons and I like the added traction it gives. I can see it being a bit rough on the pockets tho.
Basic review, again, I was not blessed with the gift of gab, so I hope this helps anyone considering the OKC Arrow. Very well made product and I'm glad I added it to my collection...I have a modest collection of folders, knives that cost me $15-$25 (Opinels and SAKs) up to a couple XM-18s and a small Sebenza, and this definitely fills a niche for me. Any questions I'll do my best to answer.
Enjoy your Sunday guys and gals,
Lee D