How bad is it? Meh. It's about what you'd expect from the 6th of any series.
Should you see it? No.
Eighteen years since Charles Band's original film comes a sequel that doesn't even have the main actor, Tim Thomerson (or Helen Hunt, for that matter). He was getting pretty old for the role, but here they pull a Dr. Who switcheroo and have his spirit inhabit the body of his daughter (who I think is also his great-grandmother in this confusing plot). The humor of the film is having a diminutive shy girl suddenly acting like the super-macho Jack Deth; that humor works... a little. The budget of this was obviously low - it's a Full Moon product, after all - and it shows, though the film was adequately directed. Oh, there's a plot... Jack has to save his daughter in a knife fight and also syringe Trancers (a sort of mind-controlled deformed zombie).