The Instamatic system was a huge hit for Kodak. Most of the Instamatic cameras were simple and inexpensive-Other than simpler film loading not much different than previous cameras, with a simple meniscus lens and single or two speed shutter.
Viewfinder showing frame lines and meter reading underexposed. Film speed is set via notches on the cartridge.
Lens collapses for storage--this also locks the shutter. Uncluttered top with only hot shoe and shutter button.
Zone (guess) focusing is a handicap, especially with a lens this fast--wide open apertures were probably best left for distant subjects. However, zone focusing is still considerably better than no focusing.