Looks interesting. I've been using the original Javelin. I bought the long first, but then switched to the standard height version so I could use it on the bench as well as prone. I haven't found the twist locks to be a problem, but I've kept it clean.
I do have trouble sometimes keeping it attached in the swivel. I don't know if I don't get it seated far enough, or just expected the super strong magnet to hold it better or what. I have to really watch it when carrying the rifle with the bipod attached (and I only do that for short distances like to move up a few yards to a closer shooting position, etc.
I am using the gunsmith adapter epoxied into 2 different rifle stocks, btw.