good point

(かち) Value (‘This painting has artistic value’)
(ちょうしょ) Strong point, as opposed to weak point (欠点).  長所 can be used about people (his 長所 is his courage, her 長所 is her brain) or machines (‘The strong point of this PC is its long battery-life’)
(とくぎ) A specific skill that one has; one’s area of expertise