I have no problems with my Commander as long as I take care of it.
Once every 2-3 months or so, I take it apart, clean out the insides, especially the washers and the surfaces where the washers contact. Then I apply a TINY bit of lubricant (Militec-1) to the blade and liner surfaces. The key here is TINY. Apply a drop to a tissue, and wipe the greased tissue on your knife. Then reassemble and tighten. I can tighten down the pivot screw so that there's no play, yet the blade stays fluid smooth.
I carry it every day, so it gets exposed to dust, pocket lint, etc. which tend to get into the mechanics and dirty up the action. If you don't carry it as much, then you might only need to do that once a year.
It's all about taking care of what matters to you.