The interior is good but not Falcon or Gulfstream quality. (materials used)
Good, comfterble seat, lots of space to store things (depending on the cabin lay out). Everything is easy to operate (except the factory coffee machine).
Looks great if it is treated correctly (have seen the result of the opposite).
btw, the manual Cat 3a option is ony for the ERJ145 and not developed for the shorter Legacy.