Yep, cheap 'n' cheerful 3.25x4.25" FP100c works in it. You've got a 100 or a 250...I think the earliest 250s didn't say "250" on the front flip cover, just like the 100s. Easy enough to tell...the viewfinder for a 100 will have separate rangefinder and viewfinder windows, and the 250 has a zeiss-ikon finder that combines the rf and vf into one window. A lot of people place the ZI finder Land Cameras as a premium model of sorts, but personally, I prefer the two-window finder. Same lens between the 100 and 250.
The right battery for this camera is $10 online, otherwise if you're handy with a soldering iron, go get an LED flashlight at a dollar store, steal the 3 AAA holder out of it, and solder it in. You might find that the darkslide and first frame or two are harder to pull out of the camera...some people break off the spring tabs inside the back or hold them back with hair pins. I never have a problem with the tabs ripping off, etc. that others seem to report.
The lens is solid enough, a 114/8.8 triplet. If it has some serious sharpness shortcomings, etc., those are masked by the not-clinically-sharp instant film anyway.
Some test pics on this lens that I shot to sell a 250, a while back: