Better than you think . . .
Watch Mario as he walks out on the course. You have your selection of clubs and you can aim, but the game does a great job at failing you if you don't aim properly at a hole and providing more depth to the greens. The wind plays a big factor too. Maybe a little more than it should, but it was good for Nintendo's first attempt.
Golf is where all golf games have really evolved from. It has given a basis that worked for other companies to improve off of. I have to give this game respect for that.