950 Rift- first expensive knife and I was thrilled. Still am. Don't carry it every day, but I do when I am off and out and about. Little dull from the factory (cut paper though), and I let some dick at a gunshow 'put an edge on it for me' with a paper wheel. I spent 2 hours getting a proper edge back. Centered perfectly, no side to side or vertical play, and I can snap the blade out with a flick of the wrist.
530- F*&cking love this knife. Thin, light, and comfortable. Super sharp from factory, snaps open, blade centered no vertical or side to side.
Grip 1- Sharp as heck, perfect in the hand, centered, no play. Work knife, and I finally managed to break the tip off by prying. I have used that knife to pry, scrape, cut, slice, dig for a year and it finally failed. It will be going back to BM with $25 to replace the blade.
Grip-2- Super sharp, flicked open from the get go.
Mini-Grip- too small for comfort. Sold it due to being to small.
Sold several 710's and a few Grips retail. All perfect and sharp from the factory.
Sorry about your luck, but maybe you should try again.