I found the locks to be good on the ones I owned, but the hole is too small for easy use in the mini-800 series knives, IMO. The fullsize 800 series knives' holes are too small, also, though I like and carry them.
The hole being too small is an issue common to many knives. To me, the Skirmish has an opening hole that is about right, though a bit small. The Military hole is right in size IMO and placement.