I just bought two sets of these, (one for the house, the other to keep handy in one of the barns), and they feel pretty good in all respects. Thought they would be all light and cheaply made, but was surprised how tight they are. One of the smaller ones need a good hammering to tighten up the riveted joints. All the others have jaws that line up perfectly.
It may be a fluke of nature, but I consider them well made. Fit and finish almost as good as Channel Locks.:
http://www.harborfreight.com/3-piece-curved-jaw-locking-pliers-set-91684.html
If they hold up, I may buy a few more sets for the Grandsons.