I think that this is a dramatic building which emphasizes the feeling of height. My one big regret is the red lighting they're going to put all over one corner side.
I think it will detract from the tower and add a "tacky" effect. White lighting would be fine.
I noticed the Sovereign building looking down 41st from at least as far west as Oak st. It definitely stands out, and should have some nice views in clear weather.
I think this may be one of the nicest building to have gone up in the last few years. It has some really appealing angles, not to mention looks impressively high.