[SP] Underground 02
Thx for mapping, everything worked fine.
I like the use of air vent but still, it's not because you're one of the few using air vent that the map should be that easy.
keep digging, you can do better with those vents.
Splendid map involving new element and creative ideas! The only flaw is that the map is too short. I'm expecting some more challenging and complex puzzles using this new element. Just don't let me down!
p.s. I love 1950s styled test chambers! 
Fantastic map, I know a lot of people here seem to enjoy really complex maps, but for me this was a nice. It wasn't overly simple and it didn't make me frustrated in not being able to work it out 
keep up the good work! 5/5
had to restart the map 3 times - in the 1st room the cube just didnt lad on the pad to activate orange gel
good map never would have thought of the vacuum i liked it 5/5 keep them coming
Same here. Given the limited options I eventually put the portals as expected but more out of frustration than anything else. Adding the same effect you see with portal where particles are sucked in to the vent would be a good thing. If you can't add the effect, have it suck something else, like a chair, or garbage like after destroying the neurotoxin plant in the main game.
And if the effect is only a one time thing instead of continuous, or if you don't want to add the effect to the other pump, add some brushes around the pipe to differentiate it from regular pipes, even to someone who hasn't paid much attention to them, like maybe a conic grid as if to better guide the objects into it.
On the second room, it would be good to see the button on the platform. There too I pass the puzzle more by chance than reasoning because I didn't know what the pipes where or that there was a button (the player can use a portal to see on the platform but that imply that the player is expecting something there as opposed to a button somewhere else in the next room or two).
On the first "sucking pump", the output pipe and the pump are not correctly aligned. And on it, from the second room, you can see "gel flow" signs (what gel? It sucks air!) and in opposite direction.
Same alignment issue with the second pump, seen through the glass, for both input and output pipes.
Nicely done. A little easy for my taste, but very well done.
I'm playing custom maps and record my first time of playing them. So the run is not perfect and may not use only intended ways, but maybe it can let you see how other people may understand the map or you could just enjoy someone playing this map for entertainment.
Anyways, here is the recording:
pr_xruSDcK0
(Link: http://www.youtube.com/watch?v=pr_xruSDcK0)
Also note the video description for more feedback and my signature for additional project information.
Portal 2 Playlists: videos 1-200 | videos 201-400 | videos 401-600 | videos 601-800 | videos 801-1000 | videos 1001-1200
My eight year old daughter completed this without help! A nicely done map.
Short but sweet.
For a short map, it did make me think. Had to rage quit once, think about it went playing some Halo 2, then realized my solution was wrong when I got back in the game, but figured it out.
Good mental challenge!