In the times that I've worked places that did this, it always completely exacerbated any underlying petty feuds that were going on between co-workers and lambas

In the times that I've worked places that did this, it always completely exacerbated any underlying petty feuds that were going on between co-workers and lambasted managers for doing things like actually managing instead of being totally cool with someone playing WOW all day. Your peers are not the best judges of your overall positive contributions to the company. Peer feedback can be important, as evidenced by some of the posts upstream, and I think it's good for a manager to get an overall feel for the team dynamic and if there's unanimous rumblings about one member that might need to be addressed. But ultimately your manager is the only person who's going to understand what positive contributions to the company that you're making, because your manager sees a bigger picture than your peers. Reviewing a manager can be a good thing or it can be a double edged sword- truly anonymous reviews are pretty much impossible so it's inevitable that you're going to be tied to your review somehow. In a perfect world managers would be adults and you'd be able to have conversations about management styles and communication styles and both parties would come to have mutual respect and understanding, but in my 15 years in the working world this has only happened to me once so I don't hold my breath for it happening again.