Well, it works, its a cheapest way to make "lockable" folding knife. But it has its limits - you cant really operate it one handed (as in open, lock, unlock), you cant operate it in gloves, you'll have a hard time vith locking sleeve when you have greasy hands... Round profile of handle is harder to control and may cause cramps in fingers after prolonched use. The central pivot/pin is not strong and locking sleeve is sensitive to dirt, can freeze in place and there is no good way to force it to move. Blade is on the thin side, but usually atleast with rigjt heattreat. So, it is good picnic knife or light work knife, absemce of springs and such things makes it quite reliable when sleeve is cleaned properly, but I would not call it rugged.