A travesty if you ask me. It's not a bad movie I guess, especially by Makoto Shinkai's standards, but it's very "animu" in a number of regards, with cliché'd dialogue and character behavior, and a total length that could easily be cut down by 1/4 or 1/3. Then again, Howl's Moving Castle did phenomenally well even though it's a very flawed movie compared to many other Ghibli movies.
At any rate, Your Name is nowhere near the quality of the masterpieces that are Spirited Away and Princess Mononoke. I'm guessing it's going to do worse than those movies internationally. It's much more Japan-centric in terms of themes, tone and tropes than those.