I have had one. It is a very fine knife with a very good sheath. For the price, it's hard to beat.
That said, I'm going to overstep my bounds here and say I would be very wary of giving a 13yo a 5.5" fixed blade knife. Unless he's a 13-year-old assassin, get him a Mora or a Swiss Army knife. I was thirteen once. It would not have been wise to have given me a Kobun. This all assumes, of course, that he's yet to prove himself to be incredibly responsible with bladed objects. Even still, that particular blades object is basically designed for totally killing dudes.