Advice on a sturdy feeder that can attach to a window

Moved from big back yard with multiple feeders to senior condo, with tiny back yard and no feeders. I am considering getting just one feeder that would attach to the large window in my dining room so the cats and I would have something to look at besides an ugly (really ugly) fence. I am not allowed to put any fasteners into the siding, or sills. Am having doubts about the suction cup types. Suggestions please.