Some good points Enworth, the "waist level finder" takes some getting used to after using an SLR , but in practice if used with your eye up to the flip up focus magnifier, and cradle the camera in both hands as I do, the camera
is at chest level, and you can get prism finders for the mamiya C 330F and C330 S and Rollei cameras, although they are heavy they do give you an image that is the right way round not" laterally reversed"as on the WLF that takes a little getting used to on all waist level finders, wether SLR or TLR, but it's a trade off between convenience and image quality that in my experience is very worthwhile making.