I tried it a while ago before they released their mobile app, but I finally opted for a different one I could use on my smartphone.

You must keep at it for several months and develop a routine for updating your notes before you can see the rewards.

I also highly recommend reading the following books:

Digital Zettelkasten: Principles, Methods, & Examples

How to Take Smart Notes: One Simple Technique to Boost Writing, Learning, and Thinking