noun
sweet spot
Refers to an optimal point or area, such as the best hitting area on a racket or bat, or an ideal balance in a situation.
テニスラケットのスイートスポットでボールをとらえると、気持ちいい。
It feels great when you catch the ball on the sweet spot of the tennis racket.
この価格帯が、品質とコストのスイートスポットだ。
This price range is the sweet spot between quality and cost.