1. I don't think we are even close to WP plugin like mentioned. They do only link mapping so they are build for that and more over its a setup on your own database.
Neuron just suggest few links in close topical space based on Google index. It's helpful, but sure nota as good as dedicated internal linking plugins.

2. we just started program where our users will compare Neuron to different tools (they use daily), so as soon as we have feedback it will be shared.