Just finished watching this movie and ohohohoh, was it fantastic! I've been a fan of these two series since the 90s and this crossover has made my inner 90s child giddy as can be! The interactions were great, the music was awesome, I found myself often laughing and the action was great, though this is a bit mature of a movie as there are limbs cut off and people being beheaded and straight up killed.
Overall, I highly recommend this movie!