Got my report 2 weeks ago, waited a little to see results and if any link drops or not, here are the results :
- Links look really good, hugely diversified so they should leave no footprint
- All links that i've tested were there, no drops after a little over 2 weeks
- Articles were readable with a higher chance of staying there a long time, definitely not badly spun content
- Saw some positive serps movement and i haven't done anything else to the site in the meantime so this service was definitely "to blame"
Conclusion, service recommended, especially since it also has a great price, I'll order one more for another site as well, that's how you can know it was good