I don't know much about the building yet, but there was an article about it some time back:
Extell Development’s luxury condominium at 150 East 86th will offer shiny new retail space of 100,000 square feet, 30,000 of which will be taken up by a new branch of Swedish clothing retailer H&M. Barnes & Noble—which plans on closing two nearby stores—will claim 55,000 more square feet, for a store only slightly smaller than the behemoth in Union Square. The new location will be one of the “real motherships for the company,” said Mitchell Klipper, the book chain’s chief operating officer.
from The New York Observer