I loved my Isolette I so much that rather than get the bellows fixed I ordered a rebuilt isolette II. It's great because it has a self-timer and one more shutter speed, and the shutter release button is way smoother. What's annoying is that it has a multiple-exposure prevention "feature".
I don't want to do multiple exposures; the problem is that the shutter release button always gets hit in my pocket and trips the ME prevention interlock, so whenever I get it out of my pocket to shoot something it won't shoot unless I wind it again first. One solution would be to not wind it, and only wind it right before shooting, but this seems like a pretty poor way to work. I'm trying to get used to tripping the shutter by hitting the metal lever on the shutter with my hand but it's kind of awkward.
Maybe I'll take the top cover off and see if this feature can just be disabled permanently. I never had any problems accidentally multiexposing my isolette I.