Andrew -
If you can appreciate work from a perfectionist, the tightest tolerances in that range, beautiful attention to detail, a great cutter, a knife that feels amazing in the hand, a knife that has been created to be the perfect EDC, and something so beautifully simple it makes you smile, then a Sebenza is very worth it. He uses good materials, 100% USA made, he's a perfectionist, has machining and knife making down to a science, has won several awards, and has a huge following. Chris makes great knives.
But if you expect it to out cut a $100 knife.. you'll be disappointed. A Sebenza is a work of art. The craftsmanship is amazing. And if you can appreciate all of that, then a Sebenza may be the knife for you.
The Attention to detail, fine craftsmanship, tolerances, artwork, simplicity, materials, where it's made, and perfectionism is what makes the Sebenza 10x your Leek.
Custom knives are great as well and you can't go wrong with a Custom. You can't go wrong with a Sebenza either.