The car is mostly just a weekend car with the intention of the occasional track day
As for how long its lasted, i've not had the car long, only about a month or so but as far as I'm aware the diff has lasted fine
As for noise I'd rather it wasnt screamin its head off all the time as I do like a bit of relaxed cruisin and I occasionaly take it to work which means it'll have to be on the motorway a bit

Basically I want something reliable and not too harsh..just dont want to keep throwing money at standard diffs if there goin to keep breaking