I like the fact that after 6 films they at least attempted to do something a little different. Honestly, it doesn't change the dynamics or what I enjoy about them. I think Jaime Kennedy & Michael Gross actually have a good chemistry. While it's not on the Fred Ward/Kevin Bacon level, there's a good rapport between them that manages to be highly entertaining.
One of the only things I felt maybe lacking over some of the other films was the production value. While it doesn't look horrible it does look cheaper. The creatures don't look quite as fleshed out and at times a bit too CGI, but not so bad it ruins things. Also, a few of the supporting characters, mainly the quote-unquote bad guys were pretty wooden and really didn't add much to the overall story. They do, however, lead to a few comical moments of dialogue.
You more or less know what you're getting with these movies at this movie. If you've never seen any of them, I would go back and start with the first one and work your way through. That's still the pinnacle of the series, followed closely by the second. They're goofy, schlocky fun. Something that's always made me gravitate to the films is they seem to know what they are. It's one of those things where it looks like they probably had fun making them and it shows on screen. Part 6 is no exception to that rule. So, if you're a fan of the other films in the franchise. This is worth a worth.