> I've never used one myself, but everyone I know who had a Newton said it was "just right".
Interestingly, a big part of the Newton's failure (along with the terrible v1 handwriting recognition, which was largely fixed later, and Apple's strained finances) was that they went for a complete break with the past; there was basically no developer familiarity. iOS was probably a sweet spot; new, purpose-designed interface bearing very little resemblance to MacOS beyond font choices, but almost the same under the hood.
Interestingly, a big part of the Newton's failure (along with the terrible v1 handwriting recognition, which was largely fixed later, and Apple's strained finances) was that they went for a complete break with the past; there was basically no developer familiarity. iOS was probably a sweet spot; new, purpose-designed interface bearing very little resemblance to MacOS beyond font choices, but almost the same under the hood.