Comment by theshrike79

For me it was the It Just Works-iness of it combined with a handy way to support the project cheaply.

As long as I'm paying for it, I'm the client and not the product.

I tried some of the third party stuff, iCloud, Dropbox, etc and with all of them I either lost data because of notes not being in sync or had to manually fix stuff. $4/month and zero issues was well worth it for a tool I literally use every day.