First of all, this add-on itself is amazing. You can literally make professional looking advertisements of your own products. I myself am a complete beginner when it comes to after effects and I have had no problem using it.
Now as for communication between the author, this is simply impeccable! Not only is the author super friendly and replies instantly to emails but they will literally make 360 renders of any containers you like free of charge!
I've also been told there's lots more presets to come in future updates. I look forward to seeing these!