I found it a bit clunky at times. Certainly it is not as clear as Portal 2 a few times but leaving that aside it's very good and you could think of it as an expansion to Portal 2, like the custom chambers but more engaging.

I found it a bit clunky at times. Certainly it is not as clear as Portal 2 a few times but leaving that aside it's very good and you could think of it as an expansion to Portal 2, like the custom chambers but more engaging.