I've had mine for about 4 weeks now, and I'm still consistently using it every day.
It's fantastic for planning, diagramming (I use this to capture measurements and dimensions for items I'm going to be making in CAD software), getting signed forms, taking notes, and sketching.
The hardware is delightful, even for left-handed folks like myself, where other tablets often make erroneous marks where my hand is resting.
Now, all that said, the software can still come along way. My single biggest gripe is that I haven't found a way to search for text within notes. I'd really love to have an option to automatically convert handwriting to text on save/close and keep that around as meta data for searching.
I may play with implementing it at some point - A large part of the reason I bought the device was because of the open ecosystem. I do software dev for a living, and knowing that I can get into the device as root and muck around REALLY makes it feel like it's mine.
I wouldn’t compare it to an iPad. This is much more tuned to helping you think - no notifications whatsoever, no web browser to offer opportunities to do something else. Or, put another way, the fact that it doesn’t do a zillion things is a good thing if your goal is to be able to think deeply.
Kind of like how some writers use ancient equipment that doesn’t connect to the internet to get their writing done.