This collection of Prince films is a great buy. 3 films for such a cheap price, and definitely well worth it. The best of the 3 films in my opinion is Purple Rain, featuring the amazing music from the album of the same name, and a great plot. Purple Rain is the only film I have ever watched that has brought tears to my eyes, because of the power felt in the conclusion, and I strongly recommend this film to everybody.
Under The Cherry Moon, a black and white film made by Prince, was another one of my favourites, a very unique and artistic feel to it, with a good story, and fantastic music.
Graffiti Bridge, was my least favourite of the 3, though parts of it were very enjoyable, I didn't think the music was as strong, nor the plot. However it still had a good message to be found by the end, and is still a great film.