Vision Tech Metron Bar End Shifters gear reviews

So frustrated with this product. Great concept, poor execution. I had these installed on my bike about 8 months ago. The brand new shifter broke before I even left the LBS during the first install. Installed a warranty replacement unit and used it for indoor training for the next 8 months. 2 days before my first race of the season, the same shifter broke again. Off to the LBS to replace the front shifter with a temp one while the Metron was out at the factor for replacement. Raced with the rear Metron shifter. At about mile 25, in the rain, the rear shifter then broke in exactly the same way leaving me with one rear gear and the FD to select from low to lower. Cost me an hour of race time at least. I will NOT be replacing these again. Either the manufacturing is poor, or the company simply didn't do any real world testing of these devices. For me to break 3 of them in less than a year is just insane.