So, I finally came around watching the movie aaaaand it's sweet, it's awesome and I love it. Only thing bugging me was that the one or other scene (especially where Naruto tries to confess) seemed a little bit mistimed and random but that's nitpicking. However, I wish the had shown 5 or 10 more minutes of the actual marriage ceremony, just for a even better feeling of conclusion, then again, nitpicking. I just imagine it myself, how it could have been and have fun (maybe end up writing a little fanfic about it).
That's all I wanted to say and if you like Naruto and haven't seen that movie yet (why would you), I highly recommend you doing so. Even if you never supported NaruHina.
Have a nice time (and don't melt in the heat).