In SPB at least, new construction is going up as fast as they can do it, and while a lot of it is done in more remote areas (end of Metro lines), there is plenty to support people who live in those areas. Dozens of full grocery stores within walking distance at the base of every complex, bus transit is plentiful and relatively frequent (compared to US bus schedules anyways), and the developers/city do seem to try to create good public places for families, such as playgrounds and parks. I have to echo what a lot of others have said, it's nice to be able to walk through the complexes and not have to worry too much about cars. The complexes closer to the city proper have some difficulty though with cleanliness just because a lot of the gardens and embankments aren't well tended to or the infrastructure built to contain the dirt has finally given out after 60 some years, and no one has bothered to fix it. The city tearing up roads and grass embankments to replace ancient plumbing doesn't help much either.
It's not perfect, obviously - the newer buildings are mostly small one or two room apartments, but they have modern amenities, are wired up with modern network and electrical, and overall look nice.
Don't think they'd ever fly in the US though...just not "personal" enough.