I have wanted to do an overview of my Konica Rapid Omega 100 for a while, but haven't made any especially good photographs with it. These three will have to suffice for illustrative purposes.
The Good:
-The rangefinder has a wide base, large & bright finding and focusing windows, parallax correction, and framelines for the 90mm, 135mm, and 180mm lenses.
-Safety interlocks with the dark slide prevent double exposures and accidental back or lens removal when the camera is loaded.
-Has 4 tripod lugs (landscape and portrait position, in US and metric thread sizes) and 3 cold shoes for accessory finders, flashes, Pez dispensers, etc.
-Fine lenses with built-in lens hoods, DOF calculators, and side-by-side aperture and shutter speed rings.
-Steady grip and leaf shutter allow handheld exposures of at least 1/15 sec. 'Holding' the camera by the focusing wheel and film advance knob on one side is not a problem. Film advance/shutter cocking action is fast despite the long throw of the lever, hence "Rapid."
-Cheaper than the Mamiya Press;
very cheap, in fact.
The Bad:
-Winding on a roll of film is a slow and cumbersome process, so changing rolls in the field is a pain in the ass. (The pro version has a magazine back which I consider a must-have feature.)
-Handgrip is uncomfortably placed when the cameras is held to the eye, and shutter release is uncomfortably placed relative to the handgrip. (Using a cable for a thumb-release instead of an index finger release would help this.)
-Difficult to handhold in portrait format.
-Important camera controls are sited in three different places (left side, right side, front and center) even though most photographers have only two hands.
-Less versatile than the Mamiya Press system, which has film backs for a multitude of formats.
The Awesome: Three words:
Pump-action rangefinder. KA-CHUNK!
Personal notes: 6x7 is my least favorite full-frame medium format, I think. It's too much of one but not enough of either, i.e. lost in the middle between 6x6 and 6x9. Also, the photo I posted of my Koni earlier in this thread is now the #2 Google Images result. Hooray for...web searching, I guess.