But as soon as I get the email for RM2 I pre-ordered again. To your point, it is the product the digital paper market has been waiting for.
I am an avid hand-writer. I have been a Levenger Circa user for more than 20 years, and basically had a subscription to the Circa paper for the last several years, as I went through so much of it. It took me a while to adjust my workflow and so forth, but I am now a full convert to the RM and think the device and the ecosystem have enormous potential, especially for developers.
The RM folks are very dev friendly, though their docs and so forth are poor at present. I take this to be a function of focus/resources rather than intent. The architecture of the software on the device is very good and dev oriented, and the code (what they've released) is well written. The device can run a webserver! The APIs- community documented- for the server-side of the RM platform are minimal but well structured. I was fairly quickly able to dig into them and write some utilities, which work reliably. So I am very optimistic about the ecosystem around these devices.
To your questions- I write on the order of 20-30 "pages"/day on the RM, and go through 1 tip maybe every 2 weeks. The writing experience is very comfortable. Adding an "eraser" to the premium RM2 pen addresses the main ergonomic inconvenience. I also use the device for reading PDFs. There are some ergonomic nits there but on the whole it works well.
Yes, RM is a new, small biz, but to my eyes they have a great product, a great approach, solid operations, and are developer friendly. I have not used the Sony device, and can't compare it, but I see nothing but good things ahead for RM.