Amazing for the price
The campaign is fairly good tho. With lots of enemies and creepy, almost disturbing environments. The ability to switch among squadmates makes the game less "standard" because you can choose to use whatever weapon or power you want, whenever you want. With lots of shooting games out there (seems like 1 is made every day) Jericho holds its own because of little things like this.
Yes the campaign is very linear, but so is Call of Duty's, enough said.
Now the one thing I don't understand about other reviews is that the level design is pretty amazing. Once you get into the game you realize how twisted these developers must have been to come up with this stuff. So what if there are tons of creepy corridors and dark candle lit rooms. Its creepy, and they wouldn't have been able to convey that kind of atmosphere with large open areas.
Overall the game is much better than you would expect and its hard not to recommend it given the price that its currently at (cheaper than a movie ticket). So get it and play it if you like horror/fps games. Just don't play it for too long at a time, cuz it does get pretty nasty.