The issues with the lockjaw aren't when it is closed, but rather the opening and closing of the mechanism. It is also a rather fickle mechanism that needs periodic adjustments. If you were to adjust it properly, close it, then just ride the bike like a non-folding bike (never opening and closing) it would be fantastic. But then you defeat the purpose of having a folder. I think the lockjaw tech just never made it past the beta stage.