Yes you are doing it correctly. It can be confusing because a 5 star rating means highlight the stars all blue.. not gold like you'd expect. I've had a few people make this mistake and rate my models 1 star by accident. when you scroll the curser over a star it will show you briefly 3, 3.5, 4.5, 5 etc. If it was a 1 star rating you would see the overall rating drop dramatically if say only 3 or 4 people had rated it.