Normally I'm happy to get any kind of peer feedback in the form of reviews but sometimes I get something that is disappointing. I recently requested feedback on a piece on a site I post on and got two reviews back. I debate whether I will get anything useful out of them. I will think hard on the subject but it doesn't look promising to me.
Both of them followed a similar format to the point where I suspect they learned this from the same source. Either both of them failed to understand it in the same dysfunctional way or they should learn from someone else. Most of the advice given was vague to the point of being useless. It's great to say you see problems with grammar without citing a single example. They both suggested I read it out loud to find the choppy parts without indicating where I might find them. Kind of funny since I did read the whole thing out loud to my daughter before posting it and now she's as baffled as I am.
Reviewing is important between writers and there is one thing you have to do to have any hope of being helpful. BE CONCRETE! I might disagree with your point of view but at least I'll know what you're talking about and exactly what you're referring to.
The most important part of writing is successfully conveying your meaning. That goes for reviews as well. I don't care if you have a degree in the subject.