I wasn't happy with those original wiper blades. From the very start there were water droplets splashing over the middle section of the left (the longer one in LHD) wiper when wiping, so after wiping the windscreen wasn't dry and clean. Also they started to sound like sandpaper, so it was time to look for better wipers. In my previous Nissan Almera I had Bosch Aerotwin blades, so I went and bought them for the i30. Just one test wipe, and I was immediately happy! Despite the left wiper being so long, it wiped the windscreen very nicely, no droplets splashing over like earlier.
My first annual service is approaching, so I need to tell the dealer strictly to not replace them. Otherwise there would be those bloody originals again, with even bloodier price...