Great Knife Cheaper at Wal-Mart or Amazon
I carry this knife every single day, and have for about 5 months. I use it probably 100 times a day (I work in a warehouse) It holds and edge even through tape, cardboard and even the occasional METAL strap. I can easily open and close it with one hand. Only con is that every 3 or 4 weeks I need to tighten up all the screws as it gets a bit wobbly, and the clip starts to loosen, but if you just do that whenever you sharpen it it works out fine.
Unlike a few people I have NEVER had this knife unintentionally open. That being said I always put the switch to the lock position before returning it to my pocket.