Mine has side-to-side blade play.
No amount of tightening the pivot screw will get rid of it. (Most of that large pivot screw area is decorative; the actual hole is tiny -- I think it takes a T6.) I'm still left with a difficult to open blade with blade play.
The dealer hand-picked this knife and reported no blade-play.
I can confirm that it was fine out-of-the-box. The play developed after a few days of opening and closing.
A Kershaw warranty rep said he had not received any similar complaints.
One other issue:
Unlike most Kershaw folders, the spacer isn't solid between the liners. There is enough space on each side to stick your fingernail -- plenty of room for dust, lint or guts and blood to get stuck.
A nice design, but, unlike another Rexford design, ZT's 0801, not a home run.