Ease of use. By far the easiest plugin I have used. Lots of features and the google calendar integration is amazing. Love it. Highly recommended to anyone who wants to visualize what they need to do ahead of time.
Planyway enabled us a better view of all our Trello cards in a calendar format. The capability to move the cards from different lists to a specific date or period gave us a better understanding of the schedule for each team. Having Planyway enabled us to speed up the way we handle and monitor almost all of our business processes.
I like how Planyway works with Trello. It allows me to organize everything easily. I use it to see how is my team's schedule and how many hours they've worked. It is useful for my reports too, since I can organize my jobs by labels.