I'd say they are beautiful and modern, I would never guess they are for "poor families".
They start out beautiful and modern, but sometimes what follows is the so-called "tragedy of the commons" -- the public areas of the building detoriorate, with graffiti and trash and urine in the hallways, because the residents have very little economic incentive to take care of the common areas. This is part of the rationale for alternative approaches that assist low-income people in buying homes or condominum apartments -- when people OWN property, they care more about protecting it, maintaining it, and even making improvements to it.

On the other hand, some "housing projects" are designed with the intention that both middle-class and poor families will live in them -- with the middle-class tenants paying something close to market rates, and the poor tenants receiving subsidies. The idea is, (1) that the "upper lower class" will be able to climb up the ladder into the "lower middle class," and (2) that the poor families in general will absorb some of the "solid bourgeois values" of their middle-class neighbors. Or, to put it another way, the assumption is that it's not a good idea to have too many poor people living too close together, because they'll learn bad habits from each other.