we looked at many flats in both MT and OS, and in our opinion, OS is miles ahead of MT in fit and finish quality, including interior appliances and bathroom fittings, plus OS has wood floors (which we preferred) compared to MT's tile; and while the club house in MT might look more fancy (al la the hideous 'french provincial' look that so many large developments favor these days), we liked the more contemporary look of the OS facilities; and the fact that while OS has 15 towers to MT/LP's 8, the actual density of people is far greater in MT...almost everyone is funneled into the single lift lobby to get down to the mall/MTR, and tight surrounding podiums mean there are always people walking everywhere..I live in OS but visit MT every week to tutor...and every week I'm glad we chose OS over MT...as for mold, i can't speak for MT, but OS often has strong breezes coming off Junk Bay, and with the proper use of aircon, we've had no worse mold problems than anywhere else we've lived...