Firstly, I would like to say that this is by far one of the best Portal 2 custom maps I've ever played. Fantastic job!
I would, however, like to point out a "bug" that I found :o
Nothing too serious, just something I noticed as a result of my weird brain not being able to solve puzzles properly:

In the second iteration of the chamber (I think), where you have to jump up onto the suspended platform in order to get the cube, I noticed, for one thing, that placing a portal just to the left of the platform, and jumping through a portal on the ground will allow you to access the platform and the cube. Not really a bug, just wanted to point it out as well.

So, the bug:
- Stand on the elevated platform with the two buttons.
- Put the cube on "portal-able" ground in advance
- Place a portal on the wall, and place a portal under the cube.
- Then quickly place another two portals on the ground: one to catch the falling cube, and one to direct it towards the Aerial Faith Plate and voila! the cube can now be catched in the air on the platform!

- Basically you have the two cubes on the platform which you can place on the two 1500 Megawatt Aperture Science Heavy Duty Super-Colliding Super Buttons BUT the chamber will not progress!!!

At least when standing on the platform. I haven't tried jumping down to simulate the jump or to activate the map trigger (I'm guessing) responsible for progressing

I hope this helps!
I don't know if this needs "fixing" in anyone's opinion, but I felt I should point it out anyway.

I hope this post finds you well

- tryagen <3