Just bought it, glad I did! 995 GC achievement points, leaderboards have nothing to do with par scores; Rather they have to do with different types of shots and combos. I only played three out of the 50 holes, got a hole in 3 with a par of 8 and was awarded my first medal. Each level has 3 goals-par, score attack and time mode. You need to look at the bottom of the level select screen to go for each goal. It's really hard to explain.
Definitely worth it to me but the directions aren't the best. Reminds me of a futuristic golf course in Paramus, NJ.