Rollei Crossbird is an ISO 200 color slide film. It comes in both 35mm and medium format. I shot a couple rolls of the medium format film and I got some great, vibrant exposures upon cross-processing them.
I shot two rolls of Rollei Crossbird 200 in my Lomography Diana F+ camera one late morning last October. The sun was out which created the perfect lighting situation for this film. Vibrant blues and greens from the sky contrasted well with the yellows, oranges, and reds from the changing leaves. The Rollei Crossbird film captured these colors perfectly.
Since Rollei Crossbird is a slide film, it can be processed in either E6 slide chemicals or C41 color negative chemicals. As the name suggests, it is meant to be cross-processed. Therefore, I chose to cross-process the film in C41 color negative chemicals. I was pleasantly surprised in that not much resolution was lost in the cross-process development of this film.
Although I love my Diana F+, it is, after all, a plastic camera with zone focusing. Thus it leaves (pun intended) a bit to be desired in how crisply in-focus the photos are. I have no doubt, though, that the film has the capability to capture sharper images with the right camera.
Rollei makes several other types of film, including Nightbird and Redbird, which are both rolled backwards in the canister. Let me know if you try out any of these films, and what you find from the experience!