From a purely performance perspective, it depends. SAR/LEO/military guys like them because they may have to pry someone out of a crashed plane/car/hummvee, or open a door, and the only breaching tool they have
right now is their knife. This isn't BS advertising, people have done this stuff in the real world, for real, when it
meant it. If you're one of those guys, sure, they are, without a doubt worth it.
If you're not, you can probably get more performance (and just as good a warranty) from RAT Cutlery (if you like "tactical" knives) or Bark River (if you like traditional designs) than you'll ever need.
So from a pure performance standpoint, most Busse owners don't "need" them.
For the aesthetic reasons, only the individual can answer that. Is the look, feel, ease of care, being part of the "community" worth it? For some, yes, for some, no.
For me, hell yes.
But I'm not a one-brand kind of guy, either. I'm also part of the RAT, BRKT and HI communities.
I'd probably buy a carbon knife of 1095 with an even better kind of warrantee for about a fourth of the money before I'd ever even think about buying a Busse.
No such animal.
There is no better kind of warranty than "Replaced for life, no questions asked."
There are a few companies that match said warranty, but it can't be exceeded.
This life is so absurdly short, why not buy what you want?
That says it all, and is what got me to buy my first Busse. My health went down the crapper including having parts cut off and problewms that will require treatment for the rest of my life, which as things look now, may not be that long, even with treatment. So I said f**k it, I'm getting the things I really want (which isn't a huge list, BTW) while I can.
So, discarding performance aspects, if you won't lose your house, car, marriage, etc over it, buy what you want and screw anyone who doesn't like it. No one has to buy what someone else likes, just what they like.