I use Planyway with Trello to keep track of and plan curriculum units for my second-grade classroom. It has absolutely changed and strengthened the way that my team and I organize our curriculum and make sure that we are on track in the way that we intend to be. Planyway allows us to see our curriculum ideas, lesson plans, trips, etc, at one glance and then move things around so easily.
A place where you can combine all of the boards so you don't have to go to each board to see what you have going on is amazing. I love the versatility, ease of use, and the simplicity of Planyway. The fact that it goes so well with Trello is definitely a plus. I tell people, if they buy anything using Trello, it's the Planyway calendar.
Planyway was an absolute gamechanger for me. Putting my trello cards into a calendar that could also sync with my iCalendar was such a big step for me in helping me plan my days and weeks. Now, when I am putting things into my Trello lists I can immediately slot those tasks into gaps between meetings, classes, etc., and realize when I've put too much on my plate for the day or week.