"The Haunted Palace", "Gunslinger", "Premature Burial", "Five Guns West", "Wild Angels" aren't available in Region 2 UK, so this collection is worth getting even if you already have "Masque of the Red Death" in MGM's Roger Corman Collection like I do.
"The Haunted Palace" is my favourite film as it is based on a H. P. Lovecraft story and features Vincent Price and Lon Chaney. Corman is better known for his "creature feature" films, but "The Haunted Palace" and "Masque of the Red Death" demonstrate just how good a director he is.
"Gunslinger" and "Five Guns West" are two of Corman's Westerns, but neither are particularly memorable, with "Five Guns West" being the better of the two. "Premature Burial" is an old-fashioned horror that features Ray Milland, star of "The Lost Weekend" and "Dial M for Murder". "The Wild Angels" is an interesting test-run about bikers for Peter Fonda, who would later appear in "Easy Rider".