highfield lever

[Walter]

I recently took down my mizzen mast on an Ed Monk Sr. 42' trysail ketch. I am replacing all wire standing rigging with swaged 316 though the castlok fitting where in good order. I have sailed the boat for a year and did not have any real complaints about the highfield levers on my running back stays. Yet I see a lot of negative feedback on these lever systems. Now that I am about to put this rigging back up, can anyone explain to me thier negative views on highfield levers?