There is two ways to look at Ghost Hunt, you can watch it and judge it by what it is, a rather average comedy anime about ghost hunting with little to no suspense, or watch the whole thing expecting to find "horror" just to get dissapointed by finding out scooby doo features more horror than this.
This anime also features the most boring opening I have seen in my life, characters that lack any sort of charm, development or emotion, predictable cases, and best of all, it it ends with a cliffhanger.
If you were looking for comedy and some suspense, feel free to watch it, if you expected horror, save yourself the time and go watch something else.