Absolutely phenomenal, if you enjoyed Portal or Portal 2, this mod is mindbogglingly awesome.

On a scale of 1-10, if Portal was a 5 difficulty, and Portal 2 was a 6 difficulty, then this mod is a 7 or 8 difficulty.
The time travel aspect of the game was very well implemented. Time travel very much wasn't intended as a gameplay mechanic for Portal 2, but this mod pulls it off so well it feels like it may as well have been part of the base game. Aside from a few minor bugs that feel more like limitations of the game than actual problems, very well done and polished mod.

My only complaint was there was a single puzzle where I moved a "present" cube that caused the "future" cube to spaz out and fly off the button it was placed on. Nothing too major, and it felt more like the game engine was bugging out as the problem completely vanished after I reloaded.

TL;DR: 10/10. Loved it. If you told me this was the first few hours of Portal 3, I'd 100% believe you.

Absolutely phenomenal, if you enjoyed Portal or Portal 2, this mod is mindbogglingly awesome. On a scale of 1-10, if Portal was a 5 difficulty, and Portal 2 was a 6 difficulty, then this mod is a 7 or 8 difficulty. The time travel aspect of the game was very well implemented. Time travel very much wasn't intended as a gameplay mechanic for Portal 2, but this mod pulls it off so well it feels like it may as well have been part of the base game. Aside from a few minor bugs that feel more like limitations of the game than actual problems, very well done and polished mod. My only complaint was there was a single puzzle where I moved a "present" cube that caused the "future" cube to spaz out and fly off the button it was placed on. Nothing too major, and it felt more like the game engine was bugging out as the problem completely vanished after I reloaded. TL;DR: 10/10. Loved it. If you told me this was the first few hours of Portal 3, I'd 100% believe you.