Unfortunately, I have no interest in Phandelver and Below because a) I don't like the direction it took (it's jarring tone shift), b) I already imported LMoP from D&D Beyond into Foundry quite a while ago, and c) I already ran LMoP for my group. So, this (along with CoS, which I'm playing in) is the pretty much my last choice of adventures to release for Foundry.
Still, like you, I'm very interested to hear from those that did purchase it about how well integrated it is. It will definitely influence me buying other adventures once they release on Foundry.
I have been playing around with updated D&D game system for Foundry, and I have to say that I like it. While I understand why (with the new revision landing this year),I really wish that they had released the 5.14e rules for purchase. I would have jumped on that.