There's a saying that 恆峰花園 is "北向山墳 南向公屋". Though not all flats are affected by that, the property price of flats with different views varies a lot. It depends on whether the resident can tolerate/accept that or not.
As I know, there is green mini-bus pass through the Garden to Tai Wan Station. The terminus is Mei Lam Estate. It is not a private shuttle bus; as I know 恆峰 has its own estate shuttle bus. I think the residents live there they will walk for 10 minutes to Mei Lam Estate or take mini-bus to Tai Wan Town for shopping.