I just listened in my office full of people, oh well lol.
It is pretty loud. I'd not want that myself tbh!
I don't think I could handle it if it sounds like my car is going to fall apart on idle
Might just opt for the standard one and save a bit of money. God this is such a hard decision.
Lead time on sachs / helix is 4 days but standard one is only 2 days so i can get my car back quicker and not have to take the train to work lol