on paper this look like a great concept represent average guy on the rebound date up tight bookish museum curator and who be really a hot superhero who save the world on a regular basis . however and director ivan reitman and writer don payne ( of the simpson ) almost fatally miscalculate in have their hero g girl ( play by strike uma thurman ) come off a a total nut job a both superhero and secret identity persona jenny johnson . the movie even cop to this in a conversation between jenny and matt saunders ( luke wilson ) follow his rescue by g girl from the statue of liberty . jenny curiously ask matt what be g girl like . matt reply and she kind of nutty i think the intent be to have jenny ( thurman ) be this lonely young woman and who have no one in her life and isolate by her great physical power . thurman do the best she can and but her jenny be a terrify mood swing in dire need of prozac . luke wilson be way too breezy in the role reversal of boyfriend and superhero girl friend . my super ex girlfriend be also a victim of bad timing and come on the tail end of superman return which play superhero straight up and so to speak . with all it quirk and inconsistent writing i still think my super ex girlfriend be funny and enjoy the movie . give that this be an ivan reitman movie and this could have be a lot well . reitman start with a great premise and and really squanders it . first off and we all love the hero . here neither jenny nor g girl be really all that likable . this be surprising for uma thurman and who be normally a charismatic and powerful presence . in the beginning her jenny or g girl be just plain weird . shocking . because if there be a woman who can play a superhero and she be thurmanshe look great . only toward the end do her jenny become more sympathetic and instead of caricature . although my super ex be not a straight superhero story and rather a romantic comedy of sort and it do not provide what every superhero mythology requiresa great super villain . here we have professor bedlam aka barry ( eddie izzard ) who really be evil lite . he be no lex luthor . no plan for global domination . bedlam rather barry do hold a grudge against g girl and and expectedly it have to do with their share past . what be bizarre you do not know who you would rather spend time withbedlam or g girl . luke wilson matt be just some dude who happen to hook up with the psycho superhero . one of the annoying thing he do be that he confide in his repugnant loser friend vaughn ( rainn wilson do a bad whack out impersonation ) . wilson sometimes play it a little too dense and and this dilute his likable charm . this do however work and in the comic sex scene with jenny . matt while date jenny or g girl realize that he be in love with his co worker hannah ( perky anna faris ) . so how do matt break up with g girl . well and it not pretty and for the most part hilarious . dramatic superhero movie work . romantic comedy with chemistry work . what may be inherently difficult be superhero satire disguise a romantic comedy . everyone love the hero . however and hero nut job . maybe not . with all uma thurman talent she be unable to accomplish this convincingly . and she do not get sufficient support from reitman and payne . thurman and wilson have enough charm and presence to survive their narrative failing . my super ex girlfriend be fun and funny . though give all involve and the movie could have be super .