We are having two toilets replaced. Soft close seats are an option, at £30 extra. We have only ever had normal seats, and I find soft close ones vaguely odd when visiting friends because of the way they resist being put down, although the DCs find it hilarious to watch the seat slowly inching down.
However, so many bathroom threads list them as desirable/must-have items. Am I missing something? If there are good reasons why it would be worth spending an extra £60 to upgrade our toilet seats, I would be interested to know them.