That's a lot of test in a small space!

Nice one. Takes a little while to work out what does what, but if you muck about for a bit to find out, then restart, it's OK ;)

Neat logical, rube goldberg, puzzle Lots of fun!

I liked how all of the elements worked together to trigger the solution. It was a bit hard to figure out at first and I had to restart, but it was fun.

For me. After you are the creator of this map, for you that's easy

small but hard

Alt solution: Press button for tractor beam, portal in room with door button, drop cube in there, stand on platform, use tractor beam to make cube stay on button.

Nice one but no need for ball

Making things harder to see or understand doesn't increase difficulty. It increases frustration. That is an old idiology and isn't suitable for Portal 2. A hard chamber should challenge the mind of the player, not the eyes or reflexes or how crippling the experience can be. I have such challenges that know the fine line between "hard but fair" and "overly frustrating":
http://www.cs2bus.com/sharedfiles/filedetails?id=378738534

Here's why your chamber falls flat:
http://www.cs2bus.com/workshop/discussions/-1/882949475710689142?appid=620

This chamber is a mess. I just got lucky finding out what did what to get to the exit. Why is there a blue gel splatter?