Get some film, load it into this mechanical body, and you’re ready to go. Get a battery if you want the dead simple under/over needle in the finder to clue you in to exposure. Done taking pictures? Put the cap back on the lens so the meter doesn’t draw power.
I was pulled into trying one of these out when I saw a listing for two of them, each with their own 50mm f/2, for all of $80. I figured if they weren’t to my taste, I’d find them homes. After shooting this roll, I still have them.
SMC Pentax-M 50mm f/2
Kodak Gold 100