Just an average Manhattan condo tower.
opinions differ (of course, and that's fine), but that strikes me as an overly negative assessment. if this shapes up to be what's depicted in the renders i think it'll be quite a bit better than "average" -- for Manhattan or anywhere, really. nice lines, elegant, and -- a rarity for Boston skyscrapers -- not overly fat/wide from any angle. as much as i love the JHT, that straight on, widest view is pretty fugly and 1 dalton won't have that problem from any viewpoint.
as for throwing off the balance or symmetry of the current JHT/Pru twin peaks -- my folks talk about how, in addition to locals making fun of the windows popping out and the whole "plywood palace" thing, a lot of people (apparently) thought that the JHT messed with the overall skyline aesthetic in a bad way. we're all just used to the back bay skyline since it hasn't changed (significantly) for 41 years. hell, i'd wager that there were those who felt that 111 huntington marred the "twin peaks" look, but these days those who complain about that tower only focus on the crown (which i think looks cool, but whatever).