MN is sluggish, nothing works 100%, waste of time ( I use a significantly amount of time on solving problems related to MN).
MN is based on a couple of good Ideas but the execution is nowhere near acceptable. If it works for you, good. It unfortunately did not work for me.
I used MN for three courses on uni (I’m studying mathematical economics and sometimes I take a physics course). I had it installed on all my devices. I got my exam results monday morning - worst results ever. This was no surprise. The blame: MN.
I’m going back to what I used to do: mainly Anki.