I've been to Chasers numerous times over my time in Madison. Gotta say it's one of the best pure bar experiences in the area. You can pretty much feel safe that any night you head out on the town there will be a decent crowd there.
On top of that they have a great selection of bar food. My favorite night to go there food-wise would have to be Wednesdays. Can't really beat their taco deal; $.75 hard shell tacos, $1.25 soft shell, and they're better than Taco Bell, so there's that.
All in all, it's tough to say anything bad about this place.