It's good because you can use it to cut through the corporate bullshit, it's bad because the people most active in it are prestige and money obsessed freaks. If you make a post without stating how much money you make 90% of your replies will be about that.

On the other hand it's saved me from multiple very very bad decisions, so it's good in that sense. It would be cool if it was more generalized and wasn't just for programmers/salespeople/project managers/quants.