I'd love a CAD drawing or a 3d animation of the internals.
But there are two points which suck: it takes about three to four times the time to open than a normal bike lock - and the key is not able to be attached to a keyring etc. and thus prone to fall down on the street or worse, into a water relief hole and no way to get it.
Yeah, the amount of faff means I just wouldn't use it - probably works out ok if it's the only lock you use but I have three (or four). Simplicity and time is of the essence.
But there are two points which suck: it takes about three to four times the time to open than a normal bike lock - and the key is not able to be attached to a keyring etc. and thus prone to fall down on the street or worse, into a water relief hole and no way to get it.