If you read some of the reviews for Playback, you may notice it receives more than its fair share of negativity. In some ways it deserves it, in others it doesn't. A lot of the criticism comes from how it's been sold. If you read the blurb, you'll see it mentions an `ex cop [played by Christian Slater] investigating a mysterious killer.' This is simply not true. For a start, Christian Slater's part in this film is little more than an extended cameo and it seems to be a blatant attempt by the studio/promoters to do their best at cashing in on the one and only (semi) big name attached to the project.
The film is actually about a group of teenagers who are trying to make their own horror film when they stumble on a particularly nasty supernatural force that links back to their town's past. In many ways, Playback is little more than a (supernatural) slasher film that loosely borrows from superior works like The Ring. You may even forget that Christian Slater is in the film because his character has so little to do.
Playback is okay. If you can ignore its miss-selling and are just looking for a run-of-the-mill horror to fill an hour and a half, then this one will probably do. Yes, there are a fair few unexplained bits that may leave you with a question mark or two over your head, but, like I say, it's far from perfect, but it just about makes the grade.