The point here is that while most physics teachers like technical stuff,
many are not programmers. Using the things should not require much
learning for non-programmers. The learning part should be about what is
observed, not how to get the measurement running. ;-)
I agree, because of that I like turtle-art  I want to use a similar interface for this board, so any people can use this platform, Is very important have a good Hardware abstraction layer, and provide many examples
Anyway, as I write below, I think it makes sense to combine it with a
NanoNote. To keep the combination cheap enough may be slightly harder.
Another advantage of our solution is the flexibility, many commercial products require special (and expensive) hardware, with our platform you can use your own hardware.
Bas can you add all of your recommendations on wiki? Your comments are very valuables for us.