What are the differences between the Coto Academy Shibuya vs Iidabashi buildings?

Hi everyone,
I’m looking at taking short-term Japanese classes at Coto Academy and I noticed they have two Tokyo campuses: Shibuya and Iidabashi.

I already know the basic curriculum differences, but I’m specifically trying to understand what the buildings themselves are like.

If you’ve studied at either campus, can you share:

• What the building feels like (new/old, clean, bright, cramped, etc.)
• Interior layout (classrooms, lounge space, vibe, noise level)
• Neighborhood feel around the building
• Is Shibuya really “nicer” or more modern since it’s newer?
• Is Iidabashi more comfortable or quieter for daily study?

I’m deciding which one to choose based on environment + comfort since I’ll be studying 1–3 months.

Any firsthand experience or photos would be super appreciated. Thanks!