Tight! It's exactly as rewarding as a Portal level should be, with that "eureka" moment where it all clicks together and you go from feeling like a moron to feeling like a genius, just for a second.
Steve Lee, that guy doesn't really care about the Portal 2 stuff, he's more into UNDERTALE now. Also let him chat, so he can say something to you... or enter a world where it's KILL OR BE KILLED=)