I have found the front tighten knives, even the X-acto handles lose their grip of blades over time. I prefer the rear tighten like the picture I posted above. Used one at work for 20 some years at it still holds well today. The old front or top tighten does not, only used it for 5 years to find that out.
I will say that the off brand knives will not always retract in the retractable handles I use at home. The blades are a little wide to retract back inside the handle.