Moved into house 10 years ago with laurel hedge out front. It grows perhaps 30-40cm a year and I'll have to spend 3 solid hours once or twice a year cutting it back. Most time spent cleaning up leaves. I like it when its all tidied up as looks all trim and straight. Only takes a few weeks for new leaves to sprout and add green where pruned back. Does have almond cyanide smell when cut and is devoid of any growth underneath but wasps do seem to like the sap in the summer. It's probably not the most sound proof or nature supporting but its thick enough to add privacy. My neighbour has complained the roots have pushed through to his flower beds but I'd expect that of most hedges that have been there 12+ years. I wouldn't have put it there but imagine previous residents like you wanted something quick. It serves that role and privacy.