.5 is definitely a low dose for anyone who has experienced it more than a few times or an actual low dose at least once. Realistically, I'd expect only a first timer could possibly think .5 is imperceptible.
Generally, a microdose is supposed to be below threshold. In other words, imperceptible. A low dose can be above threshold. This study seems to be testing something most microdose adherents would refer to as a low dose.
I switched from onenote to evernote a very long time ago to get away from microsoft office. After evernote went to shit, though, I didn't have any real alternatives so I went back to onenote. I wonder if the newest free version runs in wine.
Evernote was great for a while. Then they decided to go nuclear with monetizing it while simultaneously ruining the software with the worst design changes and features imaginable.