I have all four of Kershaw's studlock offerings, (Mini Mojo/Mojito, Spec Bump, Speed Bump, and Offset) and find the studlock to be very strong, extremely reliable, and easy to use one handed (either hand). I EDC's the Mini Mojo and Spec Bump for the last year and never had any issues with a failure of the lock. It released only when I intended it to.
This is a quote from a thread about the Spec Bump's studlock.
I have tested the Studlock against all of our other locks and it is near the top of the list.We have built a custom lock breaking machine to test locks and every one of our knives goes through this test. The Spec Bump will out perform any liner lock on the market.
Incidentalist's suggestion to try out the Mini Mojo/Mojito (name recently changed to Mojito) is a good one. If you search around, you may also be able to find the aluminum handled Speed Bump (1595ALBK) for a similar price. This'll be a bit closer in size to the Offset, and a great knife too.
The Offset is an amazing knife, the handles are very comfortable, although the new G10 handles are probably a bit more practical (grippier) than the Aluminum ones. The way it opens is amazing, not blazingly fast, but a lot of power. Definite kick to it.
Heres an old thread I posted with some pictures of the two different aluminum Offsets.
Kershaw Offset