I played it, and tbh, it wasnt nearly as good as the first.
It was still good, but it just wasnt portal. It was more like an RPG where you used portals to just jump from one platform to another every now and then. The puzzles where insanely easy, with only one or two requiring any actual cognitive thinking, the others were just a very linear shoot two or three portals, then be done. There were some levels where it required no thinking, just spending the majority of the time just looking for a spot to actually put a portal.
Let me tell you, it is amazing. I got it yesterday, and I'm a good ways into it. It starts out like portal 1 with all the testing rooms, but then a whole bunch of crazy shit happens that I won't reveal. It's really good, you gotta get it. At least torrent it.