What a nice knife. I've been EDC'ing a Mantis for a few weeks now and liking it very much. I just recently got a Pilot which is the Mantis' big brother. What a value this is - A Mayo design, backed by Buck and manufactured in China to keep costs down. I'm thrilled and quite frankly amazed at the quality of both knives for the price. The Pilot came out of the box very sharp while the edge on the Mantis could have used a touch up. But none the less, these are sturdy frame lock knives that work great for the light use duties of a desk jockey like me. 
