OK, so this is a romantic comedy, but a French version of the genre (with subtitles). Is it worth watching? I'd say no if it were an Anglo movie. You've seen this done a hundred times before. The bromance. The sloppy guy with no compelling attributes who, amazingly, gets not one but two hot women to fall for him. The only real question is will it go the 90% route (he sticks with his fiancé) or the 10% route (something comes up that justifies his leaving his fiancé). There's not much humor (or perhaps it doesn't translate from French).
The primary reason I'd recommend seeing it is that It's interesting to see familiar things in unfamiliar contexts. Do the French have bromances? Do they rely on unrealistic coincidences to move the forward? Do they use lazy clichés to get something to happen? Are their scripts the results of bizarre hatchet work, and based on ideas that seem to have been discarded along the way, but which have left fossil traces in movie in the form on non-sequiturs and character quirks that seem to have no obvious connection to the rest of the plot? Can they be Bechdel tested? Why, yes, yes to all!
The primary reason I'd recommend seeing it is that It's interesting to see familiar things in unfamiliar contexts. Do the French have bromances? Do they rely on unrealistic coincidences to move the forward? Do they use lazy clichés to get something to happen? Are their scripts the results of bizarre hatchet work, and based on ideas that seem to have been discarded along the way, but which have left fossil traces in movie in the form on non-sequiturs and character quirks that seem to have no obvious connection to the rest of the plot? Can they be Bechdel tested? Why, yes, yes to all!