Lucidchart vs Zeev: Which is best for you?

I used it for focus groups and participants were able to add sticky notes to boards I created which made my data from this research more organized, qualitative focused, and interactive ensuring everyone in the focus group was able to participate equally.

It provides so much, but the one thing that kind of bothers me is that when switching to an already open chart that I haven't visited for a few days results in a delay of displaying the chart.