A part task trainer is utterly useless for teaching people to fly as it has very limited visual, no motion nor any control force feedback. How do you teach 'select, hold, trim' in something with no control forces or motion?
PTTs are fine for teaching / practising procedures and the like, but that thing in Scotland shown in Corporal Clott's link will probably lead to negative teaching.
Quite a pretty toy, but those of us who've ever taught students whose previous experience has been on MSFS and the like know full well how difficult it is to correct bad habits introduced by computer games.