I would say, yes, they are worth it. I have carried and used a good few different knives in my time. I have had liner and frame locks from a well known (perhaps not regarded) company that are so far the only knives of that sort that I have had that actually "ran out", the locks went to 100% and developed play. This took just under a year in the worst case and that was the frame lock.
I do on occasion use other knives still to this day but those knives either have play as part and parcle of the knife or developed it in one way or another. There is also the issue of hardwear on some knives. Those little 2/56 or similar screws generally used being rather bad for stripping and deforming and that is a constant theme on this forum with the knives that do use them. I've done it myself a few times more than once.
I have had CRKs for a few years now, fixed blades were my first Chris Reeve knives but it was not long before the CRK folders were really the only folders I carried. I have had an Umnumzzan that I bought brand spanking new at the end of 2009 in my pocket since then and it still does now what it did on day one. I have had zero issues with lock wear, the lockup has sat in the same spot for years now. The same is to be said for wear of any sort on the knife, there is no play developing at all and the hardwear is all original and still solid. The hardwear
is simple but effective as are the knives as a whole. I have had no issues with stripped screws or deformed heads and those people that do have issues with CRK hardwear are a rarity.
Some people may harp on about edge retention and steel type, but in my experience they do just fine and really there is not much at all between the regularly used steels for the end user. Those that can tell a difference are probably imagining it anyway.

(there
are exceptions but not many)
The ergonomics of a knife handle really are a subjective thing and there are popularly touted knives that I just hate to hold as well as others that are a pure pleasure. For me CRK do a very nice neutral handle shape and that is one thing I do like about them alot. This is unfortunately a less present feature of more recent knives, like the 25. I'll be honest and say I'm not a huge fan of the handle shape on that knife but I know many find it to be just fine.
I was gifted a Regular sebenza that was my friends EDC for ~8 years at the time and that knife is as useable now as it has ever been. I would love to see other knives that are that age with use and still in perfect working order with original washers, screws, pivot, handle and blade, but they are few and far between. I don't mean to take anything away from other knife companies as there are many great knives out there but they just don't last like a CRK does. I say this from experience and not fanboyism as I do have things about CRK that I don't like, but for me they are the pick of the bunch for a number of reasons, for their longevity alone if anything.

:thumbup: