I find it a little difficult to rate this episode... don't know why, really. Maybe it's because I don't really know what to think of Darcy Marta, I can't really decide whether I like her or not.
It's always great though, to see Mac interact with kids. Some of you have already debated the Hollywood cliché that a woman just needs to put on a bit of makeup and turn into a beautiful swan. But in Kate's case, I think it was due to Mac's encouragement that her self confidence got a boost, which made her come out of her shell and start interacting more with people. That she did put on a bit of makeup was just a part of the process, I think.
Some of the MacGyverisms (and Kate-isms...) in this episode felt way to implausible, though. I'm not a scientist or an engineer, but just to mention one thing, I found it rather... hilarious when she caused the elevator circuits to short out just by tapping into the computer system. And in my world, "close all circuits" would give an opposite effect, shouldn't it be "open all circuits?"
OK, I'll give it a "Good" rating anyway.