Hmm, the chainsaw, or the 2x4?
To start, the gameplay is extremely addictive. Even though smashing a zombie to death seems like it would get boring, the number of ways in which you could do it would keep it from getting that way pretty well.
The graphics though, are another story althogether. For a next gen game they really arent all that stunning. The way everything looks is still pretty good, but overall, they generally dont come close to the way GoW or even CoD 2 looked. However, this doesn't subtract from the game all that much.
The best way to keep from getting bored here, is to just do side quest (aka Scoop Missions) and killing non-story related psychos. Other than that, this game has a pretty large amount of replay value. Hope you enjoy if you do decide to buy it.