Quite misleading. Guaranteed rankings? There's no such thing. Reviews? Yes, a common sense would help you get a better judgement yet tons of reviews on here are faked or demanded.
I have bought quite a few services and I agree a lot of the reviews do seem fake after I have tried them out. Though whatever I say just seems to get pushed into the thread and never mentioned again. Even for a tool I bought that was just ignored by the OP, uberblogcreator as an example. I stopped bothering reviewing things because I didn't see the point in it. So I would take the positive reviews with a grain of salt. Sort of like the random mishmash of posts on this thread. Half of what people are saying here is just gibberish. One of the best things to do is ask for a few samples to at least get an idea of what the service is going to offer. You can't really do much more due diligence than that.