bukit merah:
most units are in telok blangah which, even though quiet, has some amenities (ntuc, dental) and near to mt faber so you get some greenery. pretty close to vivocity if you want more stuff. downside is that the walk to mrt may be long.
other 4rm units are pretty ok, except the 7 units from Depot which is hard to get in or out. This estate has my favourite units (if only i could get it), i.e. that one unit at Havelock which is near to future havelock mrt station and within proximity to tiong bahru station yet far enough to get your own quietness. sadly, not applicable for chinese. Else CityVue units are pretty attractive too.
Queenstown:
most units are from the leftovers of Tanglin Halt SERS. mainly surrounded by HDBs (SkyVille, SkyTerrace and the plot in front is reserved for future development) so you dont get much of a view. some amenities from Dawson Place or the neighbouring HDB clusters. Houses are mostly 83 sqm too, which is really a bummer. And it is not exactly that close to the mrt station
Other units: either at Commonwealth 10; convenient but low level units are left-->roach alert! or at Ghim moh link which is placed in between Buona Vista and Dover with little amenities nearby.
may I know where can I see the projects/flats for the sobf?
From the HDB website I only found general huge areas and not the specific flats.