Overall I think this was an okay attempt at recreating the magic of the original, even if they can't hold a candle to it. The acting, while objectively so-so, was phenomenal for a DCOM, especially from Kim, Sadie Stanley, which is particularly impressive since this was her very first time on screen. I honestly felt like I was watching the original Kim Possible come to life as a flesh and blood person. Granted she showed too much vulnerability and insecurity, but I'll begrudgingly accept that since even in the original she occasionally doubted herself. I loved all the callbacks and references, especially having Patton Oswalt ham it up in the opening as Professor Dementor again (I cannot take over the world with THE PINK AND SHPARKLES!!!). And despite Drakken and Shego not having the right skin color (which I get, it works for a cartoon but in live action they would just look sick or ridiculous), their dynamic was spot on, her nail filing and rolling her eyes while he monologues.
The biggest weakness in this film, and admittedly it is a large one, is the plot. Drakken's evil plan is to steal the 'spark' that makes Kim so awesome. Yes, he seriously thinks he can swipe a vague and undefined quality about Kim by draining her emotional batteries. To be honest, I'm kinda impressed they came up with a villainous plot that stupid and nonsensical even by Drakken's standards. The big "twist" is that Athena, the new girl Kim and Ron befriend and who makes Kim feel inadequate by being better than her on a mission, is really a robot sent by Drakken to distract and psychologically undermine Kim. While the movie treats this as a big shock in the final act, I called that within five minutes of seeing her, mainly because they used THE EXACT SAME PLOT DEVICE in So the Drama, except there it was a boy toy and Ron was the one who felt insecure because he was scared of Mr. Handsome coming between him and Kim. Then at the end, when Drakken is going to destroy Athena to take the 'spark' that she *somehow* stole from Kim for himself, Kim states that she would do anything to save her because she is her friend. This is within FIVE MINUTES of her finding out that Athena was created SPECIFICALLY TO DESTORY HER!!! I know Kim has a big heart but good lord, all of that friendship was an act, so you have no idea what she would be like without the act. Of course this loyalty and friendship pays off when Athena turns good for real and sacrifices herself to keep the lair from self-destructing long enough for Team Possible to get away. She gets reassembled anyway and the ending shows her being a permanent member of the team.
As stupid as that all sounds, because it is, I can't hold it against the movie that much. As much as I love the original, I have to admit that the plot was often the weakest part of the show as well. Heck, even the characters often pointed out how many plot holes and unnecessary theatrics there were. What made it a classic was the characters, the humor, the action, and the novelty of seeing a heroine be both a world-saving badass and a normal teenager at the same time without having to justify it. The reboot captured those elements of the original pretty well, minus a few botched jokes (They seriously couldn't get Patrick Warburton to come back as Barkin?) hence why even though I'm giving it just an 'ok', I would give them a shot if they wanted to use this to start a whole rebooted live-action series. I just would not expect a masterpiece.