Upon arrival, the Original XL had some really bad button lock stick. I disassembled the knife, cleaned, and lubed it....then it took about 3-4 days of a bunch of fidgeting but the lock stick worked itself out. Now the thing is sweet. Great lock up, super light weight, and the perfect size for EDC. I've had lock rock issues with other brand's button locks but the Kizer seems to be holding solid. I also recommend oiling the micarta, the green pops afterwards.