My company uses easy redmine for 2 years and we are pretty satisfied with it.
Our projects are waterfall, over1 or 2 years, so imagine that the Gantt chart for our projects is huge.
Until 3rd of September there was a function that collaped the parent tasks therefore with 1 click we could get a way smaller and readable view of the ganntt.
Now this becomes very dificult, because each time you refresh the page all the tasks are shown again.
This function really helps! Please integrate it back in the application!