The team at Hennessy has been very responsive with any questions I have had throughout this process! They are always willing/able help me out when needed which makes my job much easier as well!! We've seen an increase of traffic from our website after they implemented us into their program (which was not easy).
There's nothing that stands negatively about them so far - everything looks great for now but if there were anything it would be minor things such as maybe some more training or guidance before going live? That being said though those issues can easily get fixed once you go through all phases together :) Great experience thusfar overall.