Not a case of good or bad learning. But you must agree though, that products react very differently on the trainer hand than on real hands, and lifting issues, bad prep, wrong mix-ratio etc. is something you do not encounter on the hand, neither is problems with heat friction or nicking with files, all this you have to learn afterwards, thus making it only a start...
I have a few of the EN-boks, and sorry to say, but the info is just not accurate enough, well let me put it differently, they teach methods from old days, with the new improved products so many of the more damaging things (as etching the nail) can be avoided.
But as said, as a start it's ok, but it is a start and will cost a lot (time and perhaps money as you tend to loose clients if the nails doesn't last, which isn't the case for every one I know) to learn on real hands, which would be easier if shown, or having options of training nights or 121...