Best time to go at night
Decent view of the entire Tokyo city. I wanted to compare this experience to Shibuya Sky. Its a good experience to try going once.
If you don't visit on your trip to Tokyo, you're missing out.
We exited Oshiage Station. When we exited, you get to see the Tokyo Skytree looming over you. It provides a beautiful, non-obstructed view of Tokyo Skytree. Afterwards, we went inside to purchase tickets. Same with Shibuya Sky, we were (probably) lucky and managed to grab tickets without waiting for so long. There were also fairly moderate crowds there, so no overcrowding as well.