The technical characteristics that motivated my choice:
Connections USB, Plug & Play: very convenient!
Keyboard adaptable to any kind of music creation software (I use it with cubase) and its small size.

UTILIZATION

The touch keyboard is quite nice (especially for a beginner) but nothing to do with a real piano keyboard, touch is not very deep.

Concernat the manual, I have not had any use for Plug & Play

The general configuration of the keyboard is very simple /

OVERALL OPINION

I used it a few months, I tried the M-Audio Axiom 49 (which I bought precisely)

as:
Transport simple
Connected-used
simplicity, efficiency

a minimum:
keys relatively thin (not very suitable for "large" fingers.
Octave may (but without great melodies contrast between low and high, it's perfect)

With the experience I would do without this choice problem!