Your question can be answered in many different ways so let me add what feelings/thoughts come to mind for me personally.
First, more housing in a city with a severe lack of it seems like a good thing. Second, regardless of their size, micro apartments similar to the ones that Patrick Kennedy is wrapping up at 38 Harriet Street (http://www.smartspace.net/locations/soma) are a great use of space and provide the dweller with all that is needed. Many of these folks are not in their apartments often which is meant to encourage people to get outdoors and commingle with others. Let's face the facts, we're spoiled with the amount of space we think we need.
I had a listing in the building next door at 54 Harriet and saw the entire construction process (38 Harriet). It was quite amazing to watch. They use some of the best technologies available for clean construction and sustainability like solar water heating, rainwater collection, and prefab construction. I don't know if the buildings you're referring to will utilize the same method but they should be.
I see nothing but positive results coming from projects such as this. Again, I don't know the details but the idea, in my opinion, is a good one.
Thereâ€™s no restriction on the number of student or affordable units of that size. The fear that tenant advocates evoked was "techies" renting these units and commuting out of the City. But the employed tech workers are the new bogeymen to the "progressives". They are too good to take public transport and have to have their own bus fleets. They are forcing out god know who and are gentrifying the Mission etc.