Being a "10-hour" game, it had much more time to develop and move past the simpler puzzles, so it ended up being much more challenging towards the end, especially with all the new toys they added. I'm ashamed to admit I had to cheat on 2 or 3 of final few levels... but for the most part it turned out to be stud that was obvious in hindsight.
I did predict Wheatley becoming the bad-guy though; for some reason it's becoming an unwritten rule that the britt is always the back-stabber, though in the credits he did seem genuinely sorry for what he did... I was quite pleased with the ending otherwise, you even got the companion cube back at the last second!, and while the credits song was just as passive-aggressively funny as Still Alive, the tune just didnt strike me as catchy.
All in all the dark humor was just as dark, and the puzzles were just as puzzling, so if you liked Portal 1, it's successor will be right up your alley
Additionally, I've been getting a lot of new traffic on my old Portal models lately, most likely due to Portal 2's release, but I've no immediate plans to recreate any of the new characters (or update any of the older ones), as I've been getting requests for already... but time will tell. I've also got another project in the works (which obviously has been sidetracked a bit ), but hopefully it'll be done within the next few weekends (frankly it would have been much sooner, but I've basically no time during the week anymore).
S T A T U S
But it's at my discretion
NOTE: Stamps used/edited with permission from Commander-Luminaire