Just a couple of thoughts.
What distance and what have you planted?
You can still see through the green screening, black is slightly better.
Leylandif has a bad reputation, but i remember a GQT member calling it a good servant but poor master, kept under control it's brilliant, needs cutting once a year for us. Could make a quick screen and then take out as original grows?
I've just planted bamboo between my field which is overlooked by farm track, pseudosasa i think, evergreen, grows to about 4m, clump forming in GB ratner than spreader. I'll use any surplus growth as fodder in winter.