I plastic & look are not the 1st priority,then this unit is well though out ,it fit any kind of watch bands metal or leather strap. simple (KISS) design rule .all depend on small friction & gravity & spring is gentle & functional . I had some very expensive one but not fitting well for metal band . & too much tension cause some wearing .This though make out of all plastic , if the hole up in long term use . It's the best for 4 winder unit .Setting is simple & independent very logically lay out I prefer switches than rotating dial .Unit run very quiet though not completely silence ,it doesn't make loud disturbing noise . Only missing is a sealed cover glass . I just add a little insulating tape that does the job .I noted all those other unit doors don't seal well will end up dust inside the watch with time .Highly recommended if the long term unit last .