Honest Cogent opinions without rhetoric.

I am looking for user experiences for people who have purchased transit from cogent in the 300Mbps or up range as far as performance, stability, and any other measurable metric of quality you can come up with. We have heard a lot of negatives about them, about their pricing model, about their network, about de-peering with Level 3, etc. What we really need is actual information. Thank you for your time. -Drew