From a construction point of view they don't look too sturdy - the Military extended hangers have an extra joining bit in the middle for strength and presumably to prevent twisting and strain (and snapping) of the shackles. Other than that, quite enterprising - not many companies actually bother with Series stuff, so good on them, and good a link :)
Strangely, the Suzuki parts look to be of a more sturdy design than the Land Rover ones (apart from the metal thickness):