Shape, Form, Posture, Appearance
noun, の adjective
You like the status of what's in front of you. It has an excellent shape and form to it. Imagine something that would be pleasing to you in terms of its shape.
かっこう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just be sure to note the かく reading, which gets changed to かっ.
ステキな格好だね。
That's a nice outfit!
格好いい車ですね。
Your car has a nice shape!
いや、その格好はダサいよ。
Oh, sorry. That outfit is actually pretty tacky.